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Cumulus Linux 5.0 Release Notes

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5.0.1 Release Notes

Open Issues in 5.0.1

Issue IDDescriptionAffectsFixed
3351951
None		Currently, the default core dump size limit on Cumulus Linux is 256M but the SDK generates core dumps around 800M. To avoid incomplete core files, you can increase the core dump size limit.4.2.1-5.3.15.4.0
3330705
When using TACACS+, a TACACS+ server name that returns more than one IP address, such as an IPv6 and IPv4 address, is counted many times against the limit of seven TACACS+ servers, which might cause some of the later listed servers to be ignored as over the limit. To work around this issue, you can set the prefer_ip_version configuration option (the default value is 4) to choose between an IPv4 or IPv6 address if both are present.3.7.0-5.3.15.4.0
3330654
When using TACACS+, if the /etc/nsswitch.conf file specifies passwd: files tacplus (files is listed before tacplus), the user name mapping might be incorrect; for example, the user name shown in the default prompt might be incorrect. When you use NVUE, this occurs when the priority for the authentication order of local is higher than tacacs.3.7.0-3.7.16, 4.0.0-4.4.5, 5.0.0-5.4.0
3327477
Using su to change to a user specified through TACACS+ results in becoming the local tacacs0 thru tacacs15 user instead of the named user to run sudo commands. When sudo asks for the password of the named user, it is unlikely to match that of the local tacacs0 thru tacacs15 user.3.7.0-3.7.16, 4.0.0-4.4.5, 5.0.0-5.4.0
3301988
Some EVPN multihoming show commands might cause BGP to crash if you use the json flag and attempt to reference the default VRF by name. For example, show bgp l2vpn evpn es-vrf json.5.0.0-5.3.15.4.0
3235368
When you try to configure VRF route leaking between many VRFs using multiple NCLU commands before running the net commit command, the commit fails. To work around this issue, configure VRF leaking one command at a time and run net commit after each command.4.4.4-5.2.15.3.0-5.4.0
3234085
None		When you configure or unconfigure a BGP peer and interface towards a host, memory corruption can cause BGP to crash.5.0.1-5.3.15.4.0
3228899
None		If two FDB entries are added in hardware with a single API call (at the same time), when one entry already exists in hardware and the additional entry has a tunnel type, the resulting FDB entry might be configured improperly in hardware. This can cause corruption of the packets that match the FDB entry.4.4.0-4.4.2, 5.0.0-5.0.14.4.3-4.4.5, 5.1.0-5.4.0
3227677
When daylight saving time changes the time, the MLAG initDelay timer resets and all MLAG bonds go down.4.4.4-5.2.15.3.0-5.4.0
3217675
When you run the NVUE nv set bridge domain br_default multicast snooping enable off command to disable multicast snooping, the bridge still shows that multicast snooping is enabled.5.0.1-5.2.15.3.0-5.4.0
3217674
Multicast PTP over UDP traffic does not forward to data ports when the PTP service is disabled. To work around this issue, change the ptp.timestamping setting to FALSE in the /etc/cumulus/switchd.conf file, then restart switchd.5.0.1-5.2.15.3.0-5.4.0
3216922
None		RADIUS authenticated users with read-only access to NCLU commands (users in the users_with_show list) can run edit commands if a username for a non-local account is on the users_with_edit line of the /etc/netd.conf file. To work around this issue, make sure that all usernames on the users_with_edit line of the /etc/netd.conf file are configured local users for the system (real Linux users).3.7.0-5.2.15.3.0-5.4.0
3211359
The net show interface detail command output shows Type=Unknown for the specified interface.4.4.3-5.0.15.1.0-5.4.0
3211054
On the NVIDIA Spectrum-2 switch, when receiving multicast traffic on a PIM enabled VLAN, the multicast traffic is forwarded correctly to the associated VLAN, however WJH shows traffic loss with the error:

Packet size is larger than router interface MTU – Validate the router interface MTU configuration
4.4.2-5.2.15.3.0-5.4.0
3202991
Locally generated multicast traffic including IGMPv2 GSQs do not transmit to local clients when using PIM.5.0.1-5.2.15.3.0-5.4.0
3200373
After rebooting the switch, the IPv6 link local address for an SVI that belongs to non-default VRF is missing, and doesn’t show on the switch. To resolve this issue, run the ifreload -a command.5.0.0-5.2.15.3.0-5.4.0
3195345
Communication between single-connected MLAG hosts on different switches fails because packets received by single-connected MLAG hosts are not forwarded over the peer link. To work around this issue, when adding a switch to an MLAG pair, enable all the interfaces.5.0.0-5.0.15.1.0-5.4.0
3192808
None		When the switch receives an LLDP frame from a Cisco router right after a ptmd restart, the ptmd service crashes.4.3.0-5.2.15.3.0-5.4.0
3157240
When you try to query REDECN counters with the mlxcmd utility on a bond member port with the following commands, syslog reports an error
sudo /usr/lib/cumulus/mlxcmd roce counters –port sudo /usr/lib/cumulus/mlxcmd qos counters –clear –port
4.4.4-5.1.05.2.0-5.4.0
3150317
During a host failure, where a link remains up but LACP stops being sent, the EVPN multihoming ES bond goes into bypass mode active without a link state change.4.4.2-5.2.15.3.0-5.4.0
3142615
The BGP4-MIB.txt file is missing from Net-SNMP in Cumulus Linux 5.0.0 through 5.2.1 and 5.4.0.5.0.0-5.4.0
3141818
If there is extensive and continuous next-hop group (NHG) churn when routes keep moving from one NHG to another NHG repeatedly, switchd increases in memory allocation until memory is exhausted. Other processes might be affected as they try to acquire memory which is unavailable.5.0.1-5.1.05.2.0-5.4.0
3138746
The switch duplicates DHCP packets that pass through the VTEP.4.3.0-5.1.05.2.0-5.4.0
3138057
When the next hop interface for EVPN type 5 routes flaps, FRR might uninstall the routes and Route install failed appears in /var/log/frr/frr.log. To work around this problem, restart FRR with the sudo systemctl restart frr command.4.4.0-5.2.15.3.0-5.4.0
3136983
When a layer 3 neighbor entry resolves to a bridge FDB entry that does not exist in the kernel, switchd might contribute to high CPU load while it continues to try to sync and resolve the neighbor entry. This results in many sync_l3_nexthop messages printed to /var/log/switchd.log.5.0.1-5.1.05.2.0-5.4.0
3136905
When you upgrade from Cumulus Linux 5.0.1 to Cumulus Linux 5.1.0, the upgrade adds KexAlgorithms and MACs configuration to the /etc/ssh/sshd_config file without prompting for confirmation. This might cause the /etc/ssh/sshd_config file to be incorrect if there is a Match section; KexAlgorithms and MACs must come before Match. To work around this issue, move the lines that start with KexAlgorithms and MACs before Match or remove them, then restart the SSH service with the sudo systemctl restart ssh command. If you have already specified KexAlgorithms or MACs, you can remove the newly added lines after upgrade.5.0.1-5.1.05.2.0-5.4.0
3131423
During EVPN multihoming bond failover, ARP and ND redirection fails if you configure layer 2 VNIs and ES bonds before you configure the loopback IP address of the switch. To work around this issue, configure the loopback IP address, then restart FRR with the systemctl restart frr command.4.3.0-5.1.05.2.0-5.4.0
3123556
When you configure an interface in FRR to send IPv6 RAs before you configure the interface in the /etc/network/interfaces file, the switch does not process IPv6 RAs. To work around this issue, remove the interface configuration in FRR and reapply it.3.7.15-4.3.0, 4.4.0-5.1.04.3.1, 5.2.0-5.4.0
3119673
If the switch receives an EVPN route with multiple RTs that match the import policy for a local VNI, the bgpd service crashes.5.0.0-5.1.05.2.0-5.4.0
3119615
In an MLAG topology, if you admin down a single connected interface, any dynamic MAC addresses on the peer link are flushed, then added back momentarily, which creates a disruption in traffic.3.7.15-5.1.05.2.0-5.4.0
3117340
When you edit the /usr/share/openvswitch/scripts/ovs-ctl-vtep file to change the ovs-vtepd configuration between vlan-aware and vlan-unaware mode, ovs-vtepd crashes when you restart the service. To recover, restart the networking service with the sudo systemctl restart networking command.4.3.0-5.1.05.2.0-5.4.0
3115415
In the Cumulus-BGPVRF-MIB, the bgpPeerFsmEstablishedTime OID does not correctly report the time since a BGP session goes down.4.4.4-5.1.05.2.0-5.4.0
3112971
When you configure a VRF static route using the legacy command syntax in FRR (for example: ip route 10.0.0.0/8 172.16.1.1 vrf vrf-red), then make subsequent VRF or route configuration changes, FRR might crash. To avoid this problem, use the current method for configuring VRF routes within the VRF stanza:
vrf vrf-red
 ip route 10.0.0.0/8 172.16.1.1 vrf vrf-redend vrf
4.4.3-5.1.05.2.0-5.4.0
3112938
In the Cumulus-BGPVRF-MIB, the bgpPeerFsmEstablishedTransitions OID always reports a value of 0.4.4.4-5.1.05.2.0-5.4.0
3084476
QOS traffic shaping doesn’t restore the default configuration after you disable traffic shaping in the /etc/cumulus/datapath/qos/qos_features.conf file. To work around this issue, restart switchd.4.4.3, 5.0.0-5.4.04.4.4-4.4.5
3084027
Under a high load, you might see ingress drop counters increase. The drops are classified as HwIfInDiscards in ethtool and shown as ingress_general in hardware.4.3.0-4.4.5, 5.0.0-5.4.0
3081232
On the NVIDIA Spectrum 1 switch, when a port goes down, it might not come back up. To work around this issue, disable, then enable the port.5.0.0-5.2.14.4.4-4.4.5, 5.3.0-5.4.0
3077736
When you run the NVUE command to change the minimum interval between received BFD control packets or the minimum interval for sending BFD control packets, the configuration apply fails.

cumulus@switch:~$ nv set vrf default router bgp neighbor 10.10.10.2 bfd min-rx-interval 400
cumulus@switch:~$ nv config apply
2022-05-04T21:36:10.800975+00:00 switch frrinit.sh16431: Stopped watchfrr.
5.0.1-5.1.05.2.0-5.4.0
3077547
When you configure multiple multicast RPs with groups matched by prefix lists, Cumulus Linux selects only one of the RPs and this selection is incorrect.5.0.1-5.1.05.2.0-5.4.0
3077513
When a MAC address is moved to a new VTEP in an EVPN MAC mobility scenario using traditional bridges, there might be up to 30 seconds of convergence delay.5.0.1-5.1.05.2.0-5.4.0
3074390
You can not apply NVUE configurations when TACACS is enabled for user authentication. To work around this issue, add the nvue account to the exclude_users line in /etc/tacplus_nss.conf:
exclude_users=root,daemon,nobody,cron,radius_user,radius_priv_user,sshd,cumulus,quagga,frr,nvue,snmp,www-data,ntp,man,_lldpd,*
5.0.1-5.3.15.4.0
3066664
In an EVPN-MH configuration, the switch fails to redirect tagged frames with the CoS bits set.4.4.0-4.4.3, 5.0.0-5.4.04.4.4-4.4.5
3061445
When you run the NVUE command to change the minimum interval between received BFD control packets or the minimum interval for sending BFD control packets, the configuration apply fails
cumulus@switch:~$ nv set vrf default router bgp neighbor 10.10.10.2 bfd min-rx-interval 400cumulus@switch:~$ nv config apply2022-05-04T21:36:10.800975+00:00 switch frrinit.sh16431: Stopped watchfrr
5.0.1-5.1.05.2.0-5.4.0
3059566
When you add an interface to a layer 3 bond, traffic does not forward and you see errors similar to the following:
2022-05-02T13:14:40.118597+00:00 cumulus sx_sdk: ROUTER: Failed to delete router interface(27) ref count isn’t 0, err= Resource is in use
4.4.2-4.4.3, 5.0.1-5.4.04.4.4-4.4.5
3059380
When you configure VRF leaking from the default VRF to a non-default VRF, SSH sessions originating from the switch CLI in the default VRF do not connect to devices in the non-default VRF.5.0.1-5.1.05.2.0-5.4.0
3059135
In an OSPF configuration, after you change the IPv6 subnet mask, the old address remains in the RIB as a connected OSPF route
To resolve this issue, restart FRR with the sudo systemctl restart frr command.		4.3.0-5.1.05.2.0-5.4.0
3055255
When you run the NVUE nv show interface command, a watchdog timeout might occur and the nvued service fails.5.0.15.1.0-5.4.0
3054869
When you run NVUE commands as part of ZTP scripts, the commands fail with errors that indicate a missing $HOME environment variable. The issue has been fixed where the ZTP module initializes the $HOME environment variable before launching the ZTP scripts. However, if you are running older releases, before you use any NVUE commands in the ZTP script, add a section and define the HOME environment variable. Populate the variable with the default expected root user home directory value (/root), then export the HOME variable so it is available globally for NVUE to use
HOME=/rootexport HOME
5.0.0-5.1.05.2.0-5.4.0
3053197
The cl-resource-query command output shows ECMP nextHop Table exhaustion (above 100 percent utilization) and the switchd.log file contains ECMP resource errors with routes and next hops failing to install.4.2.1-4.4.5, 5.0.0-5.4.0
3046023
The cl-resource-query command output shows ECMP nextHop Table exhaustion (above 100 percent utilization) and the switchd.log file contains ECMP resource errors with routes and next hops failing to install.4.2.1-5.1.05.2.0-5.4.0
3044596
In the non-default VRF, BFD goes down after port flap.5.0.1-5.1.05.2.0-5.4.0
3041425
When you add or remove PortAutoEdge on a bond with the NVUE nv set interface bridge domain br_default stp auto-edge command, the command fails with the following error and then attempts to enable or disable PortAutoEdge on any interface also fail
cumulus@switch:~$ nv set interface swp1 bridge domain br_default stp auto-edge offcumulus@switch:~$ nv config applyUnable to reload-or-restart services (switchd,ifreload-nvue.service):[sudo] password for nvue: Job for ifreload-nvue.service failed because the control process exited with error code
Failure during apply. Ignore? [y/N]
5.0.1-5.1.05.2.0-5.4.0
3041307
If you update the MAC address of an SVI using ifreload and hwaddress, the kernel maintains a stale permanent fdb entry for the old MAC address.3.7.15, 4.3.0, 4.4.0-4.4.3, 5.0.0-5.0.13.7.16, 4.3.1, 4.4.4-4.4.5, 5.1.0-5.4.0
3040080
On Spectrum-2 switches, when a packet has a CRC and the ports are in cut-though mode, the switch might stop forwarding traffic.4.4.2-4.4.3, 5.0.0-5.0.14.4.4-4.4.5, 5.1.0-5.4.0
3037824
The NVUE nv show interface link state command shows an empty table instead of showing the port link state.5.0.0-5.3.15.4.0
3035855
When you configure ACLs on the switch, you might see a switchd segmentation fault.5.0.15.1.0-5.4.0
3032234
In BGP unnumbered, when you try to remove an interface from the underlay default VRF with the NVUE nv unset vrf default router bgp neighbor command, the command fails to apply.4.4.2-5.0.15.1.0-5.4.0
3021897
After you remove the port from the EVPN-MH bond, the port stays in the PRTDN state with the protodown flag ON.4.4.3, 5.0.0-5.0.14.4.4-4.4.5, 5.1.0-5.4.0
3021838
PBR rules that you apply to interfaces in the default VRF install in the kernel with the action lookup local. As a result, packets that match this rule only perform a route lookup in the local table (which contains special routes for local IP addresses and broadcast addresses) but not in the main table (which contains unicast routes). As a result, policy routing might be applied to traffic incorrectly.4.4.2-5.0.15.1.0-5.4.0
3021696
When you run the /usr/share/snmp/resq_pp.py script used by SNMP, you see the following log message in syslog regardless of the forwarding table profile set in the /etc/cumulus/datapath/traffic.conf file.4.4.0-4.4.3, 5.0.0-5.0.14.4.4-4.4.5, 5.1.0-5.4.0
3021693
When ARP suppression is off, Cumulus Linux sends GARPs from neighmgrd for remote neighbors over VXLAN.3.7.15-4.3.0, 4.4.0-4.4.3, 5.0.0-5.1.04.3.1, 4.4.4-4.4.5, 5.2.0-5.4.0
3017127
After you convert a port from a layer 2 bond member to a layer 3 port, the switch drops transmitted untagged packets as egress VLAN membership discards
To work around this issue, restart switchd with the sudo systemctl restart switchd.service command.		4.4.2-4.4.3, 5.0.0-5.4.04.4.4-4.4.5
3016882
In certain cases, when you power cycle the switch, the NVUE configuration might become corrupted, which prevents NVUE from running. You see a critical error in the log file similar to:
CRITICAL: cue_versions_v1.repo: The NVUE internal data store is corrupted or has been initialized incorrectly. The is an unrecoverable error
To work around this issue, remove the /var/lib/nvue/config and /var/lib/nvue/meta directories, then restart the nvued service with the sudo systemctl start nvued command. If possible, NVUE recovers user configuration and saves it in the /etc/nvue.d directory. The recovered configuration will be saved as YAML files, which are named as nvue-recovery-.yaml. You can reapply the recovered configuration with the nv config patch nvue-recovery-.yaml followed by nv config apply commands.		5.0.1-5.1.05.2.0-5.4.0
3014664
On the NVIDIA SN3420 switch, the smonctl command output shows the maximum PSU temperature higher than the critical temperature.4.4.2-4.4.3, 5.0.0-5.4.04.4.4-4.4.5
3008388
When you set vlan-bridge-binding on for a VLAN interface, the VLAN interface status does not change to down even when all bridge member ports are down.4.4.3-5.0.15.1.0-5.4.0
3007020
The sudo smonctl command output shows an error for the ASIC temperature sensor (temp6).5.0.0-5.0.15.1.0-5.4.0
3003167
Updating an existing tunnel configuration with NVUE or directly in the /etc/network/interfaces file causes traffic loss. The original tunnel is destroyed and then recreated (with a new ifindex)
The new behavior will make sure to apply the configuration delta without disrupting any traffic as much as possible. Note that a tunnel mode change can’t be applied without causing traffic loss.		5.0.0-5.0.15.1.0-5.4.0
2999253
If you remove NGINX from the switch, then run apt autoremove, switchd does not reload. This occurs because removing NGINX also removes the libyaml-0-2 and python-yaml packages, which are required for the switchd consistency check.5.0.0-5.0.15.1.0-5.4.0
2999243
sFlow fails to send flow samples.5.0.0-5.0.15.1.0-5.4.0
2994402
When you run ifquery as non-root, EVPN multihoming bond configuration fails
To work around this issue, always use sudo when running ifupdown2 commands (ifup, ifreload, ifdown, and ifquery).		4.4.2-5.0.15.1.0-5.4.0
2993719
After you delete the last vxlan-remoteip configuration line from the /etc/network/interfaces file and run the ifreload -a command, the corresponding BUM flood entry is not removed.3.7.15-5.0.15.1.0-5.4.0
2978165
When you use NVUE to configure an ACL rule with a set cos action, the nv config apply command fails with the following error message:{nofromat}$ cumulus@switch:~$ nv config applyFailed to prepare to applyUnrecoverable internal error{nofromat}5.0.15.1.0-5.4.0
2972540
With RADIUS enabled for user shell authentication, there might be a delay in local user authentication for non cumulus user accounts.5.0.0-5.4.0
2964279
When a VNI flaps, an incorrect list of layer 2 VNIs are associated with a layer 3 VNI. The NCLU net show evpn vni detail command output shows duplicate layer 2 VNIs under a layer 3 VNI.3.7.15, 4.4.2-4.4.5, 5.0.0-5.4.03.7.16
2957968
After you install the RADIUS libnss-mapuser package, the nvued service fails to start.5.0.0-5.0.15.1.0-5.4.0
2951110
The net show time ntp servers command does not show any output with management VRF.3.7.15-3.7.16, 4.1.1-4.4.5, 5.0.0-5.4.0
2949123
The NVUE command nv show service ntp mgmt server does not show any configured servers.5.0.0-5.2.15.3.0-5.4.0
2943443
Cumulus Linux lets you add more than one VXLAN interface to same VLAN on the same bridge. This is an invalid configuration as certain Cumulus Linux components, such as switchd, expect a single VNI for a given bridge or VLAN.3.7.15, 4.2.1-4.3.0, 4.4.2-5.0.13.7.16, 4.3.1, 5.1.0-5.4.0
2943080
The overlay ASN is removed after a route flap.4.4.0-5.0.15.1.0-5.4.0
2940005
If you reboot the switch when using WJH, you need to start the what-just-happened service even if the service is enabled.5.0.15.1.0-5.4.0
2939231
If you use NVUE to configure selective route leaking to exclude certain prefixes, the route map fails to apply when you run the nv config apply command.5.0.0-5.0.15.1.0-5.4.0
2933466
You cannot run NVUE commands to configure route leaking. To work around this issue, create a snippet in yaml format and add the configuration to the /etc/frr/frr.conf file.4.4.0-5.0.15.1.0-5.4.0
2914835
NVUE flexible snippets create invalid YAML files.5.0.0-5.0.15.1.0-5.4.0
2913859
ECMP error messages, similar to the following, show in log files:
Dec 15 10:01:35 leaf01 switchd3431: hal_mlx_sdk_nexthop_wrap.c:361 ERR ECMP: cmd CREATE failed: No More Resources, nexthops 1Dec 15 10:01:35 leaf01 switchd3431: hal_mlx_sdk_nexthop_wrap.c:621 ERR ECMP: failed to CREATE static ecmp in hwDec 15 10:01:35 leaf01 switchd3431: hal_mlx_sdk_nexthop_wrap.c:656 ERR ECMP: cmd CREATE failed: No More Resources, nexthops 1Dec 15 10:01:35 leaf01 switchd3431: hal_mlx_ecmp.c:1540 ERR ECMP: failed to allocate hw ecmp status No More ResourcesDec 15 10:01:35 leaf01 switchd3431: hal_mlx_ecmp.c:1561 ERR ECMP: error allocating static ecmpDec 15 10:01:35 leaf01 switchd3431: hal_mlx_ecmp.c:2207 ERR ECMP: failed to find ecmp container
4.4.0-5.0.15.1.0-5.4.0
2910017
SNMP reports the same ifType of ethernetCsmacd(6) for loopback interfaces.3.7.15-4.4.2, 5.0.0-5.4.04.4.3-4.4.5
2904450
When you run the ethtool -m or the l1-show command, the 400G interface optical values do not show.4.4.0-4.4.5, 5.0.0-5.4.0
2903374
The nv show interfaces command returns a 500 error and syslog shows a python error, triggered by third party devices (non CL) missing LLDP fields
To work around this issue, disable LLDP on a single interface.		5.0.0-5.0.15.1.0-5.4.0
2898044
NVUE commands including the nv config apply command might fail with the following error because the /etc/resolv.conf file is missing
Failed to prepare to applyUnrecoverable internal error
5.0.0-5.0.15.1.0-5.4.0
2891255
CVE-2021-39925: Buffer overflow in the Bluetooth SDP dissector in Wireshark 3.4.0 to 3.4.9 and 3.2.0 to 3.2.17 allows denial of service via packet injection or crafted capture file
Vulnerable: <= 2.6.20-0+deb10u1Fixed: 2.6.20-0+deb10u2		4.0.0-4.4.1, 5.0.0-5.4.04.4.2-4.4.5
2890681
CVE-2021-42771: relative path traversal in Babel, a set of tools for internationalising Python applications, could result in the execution of arbitrary code
Vulnerable: 2.6.0+dfsg.1-1Fixed: 2.6.0+dfsg.1-1+deb10u1		4.0.0-4.4.1, 5.0.0-5.4.04.4.2-4.4.5
2886488
NVUE commands fail to configure port mirroring.5.0.0-5.0.15.1.0-5.4.0
2886476
If you enable or disable the advertise primary IP address setting when originating EVPN default type-5 routes, the default route or prefix originated from one of the MLAG peers sends a null layer 3 VNI, which prevents the remote VTEP from installing the default route.5.0.0-5.1.05.2.0-5.4.0
2885287
When you change the port breakout configuration, you must restart switchd to clean up any previously-associated port states and reinitialize the ports. Reloading switchd does not work.5.0.0-5.0.15.1.0-5.4.0
2875338
In a scaled EVPN-MLAG configuration (observed with 400 or more VNIs and 20K or more MAC addresses – the actual scale might vary), when the peer link flaps causing all VNIs to come up at the same time, there might be high CPU utilization on the system for several minutes and the FRR service might restart. After FRR restarts or the CPU utilization settles down, the system functions normally.4.2.1-4.3.0, 4.4.0-5.0.13.7.16, 4.3.1, 5.1.0-5.4.0
2867248
The validate-ports -d command does not return the correct speeds for ports. Use the speeds specified in the /etc/cumulus/ports.conf file.5.0.0-5.1.05.2.0-5.4.0
2867042
When connecting the SN4600V to an SNxxxx system, it must run in auto-negotiation mode (not force mode) otherwise the wrong Tx configuration might be chosen.5.0.0-5.4.0
2861989
Incomplete or unnecessary configuration in FRR results in FRR restarting instead of rejecting the configuration with an error.5.0.0-5.0.15.1.0-5.4.0
2860323
If two FDB entries are added in hardware with a single API call (at the same time), when one entry already exists in hardware and the additional entry has a tunnel type, the resulting FDB entry might be configured improperly in hardware. This can cause corruption of the packets that match the FDB entry.4.4.0-5.0.15.1.0-5.4.0
2859015
In a static VXLAN configuration with a traditional VXLAN device, enabling bridge learning on the VNI leads to an incorrect warning and the setting is removed in the next commit. The warning is similar to the following:
warning: vni10: possible mis-configuration detected: l2-vni configured with bridge-learning ON while EVPN is also configured - these two parameters conflict with each other
5.0.0-5.4.0
2855908
Traffic failover in a multicast topology with redundancy has the mroute stuck in a prune state and PIM join messages continue to send. To work around this issue, run the vtysh clear ip mroute command.3.7.15-4.3.0, 5.0.0-5.4.04.3.1-4.4.5
2847919
Configuring a router with the REST API through the switch front panel ports (swps) is supported in the default VRF only
To work around this issue, use the localHost IP address or the MGMT IP address to configure router using the Rest API.		5.0.0-5.4.0
2847755
When you use NCLU to remove the configuration for a peer that is a member of a group but also has other peer-specific configuration, you must remove the peer-specific configuration before you delete the peer in a separate NCLU commit.5.0.0-5.4.0
2831968
The switch duplicates DHCP packets that pass through the VTEP.4.3.0, 4.4.0-4.4.5, 5.0.0-5.4.04.3.1
2823307
Cumuls Linux does not support a bond with more than 64 ports. Any configuration with more than 64 ports in a bond changes all ports to down when you apply the configuration.5.0.0-5.4.0
2821929
FRR restarts even when the NVUE configuration overwrite mode is set.5.0.0-5.3.15.4.0
2815646
In an EVPN configuration, an FRR restart on a border leaf VRRP master causes a stale route for the VRRP VIP on some remote VTEPs to point to the VRRP backup after convergence.3.7.12-3.7.15, 4.3.0, 4.4.2-5.0.13.7.16, 4.3.1, 5.1.0-5.4.0
2812075
When you configure PIM, you can either configure RP mappings for different multicast groups or use a prefix list to specify the RP to group mapping. You cannot use the two methods together.5.0.0-5.1.05.2.0-5.4.0
2743186
When you use MD5 passwords and you configure a non-default VRF before the default VRF in the /etc/frr/frr.conf file, numbered BGP sessions do not establish.3.7.15-5.1.05.2.0-5.4.0
2736108
When you change the VRRP advertisement interval on the master, the master advertisement interval field in the show vrrp command output does not show the updated value.4.4.0-4.4.5, 5.0.0-5.4.0
2734103
ACL [No More Resources] messages keep appearing and you can’t reinstall the ACL.4.3.0-5.1.05.2.0-5.4.0
2713888
With the ip-acl-heavy TCAM profile, the following message might appear after you install an ACL with NCLU or cl-acltool and the ACL might not work correctly
hal_flx_acl_util.c:378 ERR hal_flx_acl_resource_release resource region 0 size 7387 create failed: No More Resources
To work around this issue, change the TCAM profile to acl-heavy or ip-acl-heavy with ACL non-atomic mode.		3.7.15-5.0.15.1.0-5.4.0
2705056
SVIs do not inherit the pinned MAC address of the bridge.4.3.0, 5.0.0-5.4.04.3.1-4.4.5
2701000
A default route learned from DHCP on eth0 in the management VRF might install in the default VRF if eth0 is disconnected and the original next hop is reachable in the default VRF. To work around this issue, delete the DHCP lease file for eth0 with the sudo rm /var/lib/dhcp/dhclient.eth0.leases command.4.3.0, 5.0.0-5.4.04.3.1-4.4.5
2685994
When you use the NVUE command nv set interface lo router ospf area to configure OSPF on a loopback interface, the configuration fails to apply
To work around this issue, configure the loopback interface in the desired OSPF area with the nv set vrf default router ospf area 0 network command and reference the assigned prefix of the loopback interface. For example:
cumulus@leaf01:~$ nv set vrf default router ospf area 0 network 10.10.10.1/32
4.0.0-5.0.15.1.0-5.4.0
2684925
The NVUE nv show vrf default router bgp peer command produces a 404 not found error.4.4.0-4.4.5, 5.0.0-5.4.0

Fixed Issues in 5.0.1

Issue IDDescriptionAffects
2908541
Running apt dist-upgrade causes switchd to stop and never start again. Do not use apt dist-upgrade; use apt upgrade instead. Cumulus Linux does not support apt dist-upgrade
To work around this issue, if you run apt dist-upgrade and switchd no longer works, run the apt install sx-sdk-eth-dev command (and run the command for any other removed package) or reinstall the Cumulus Linux image.		5.0.0

5.0.0 Release Notes

Open Issues in 5.0.0

Issue IDDescriptionAffectsFixed
3351951
None		Currently, the default core dump size limit on Cumulus Linux is 256M but the SDK generates core dumps around 800M. To avoid incomplete core files, you can increase the core dump size limit.4.2.1-5.3.15.4.0
3330705
When using TACACS+, a TACACS+ server name that returns more than one IP address, such as an IPv6 and IPv4 address, is counted many times against the limit of seven TACACS+ servers, which might cause some of the later listed servers to be ignored as over the limit. To work around this issue, you can set the prefer_ip_version configuration option (the default value is 4) to choose between an IPv4 or IPv6 address if both are present.3.7.0-5.3.15.4.0
3330654
When using TACACS+, if the /etc/nsswitch.conf file specifies passwd: files tacplus (files is listed before tacplus), the user name mapping might be incorrect; for example, the user name shown in the default prompt might be incorrect. When you use NVUE, this occurs when the priority for the authentication order of local is higher than tacacs.3.7.0-3.7.16, 4.0.0-4.4.5, 5.0.0-5.4.0
3327477
Using su to change to a user specified through TACACS+ results in becoming the local tacacs0 thru tacacs15 user instead of the named user to run sudo commands. When sudo asks for the password of the named user, it is unlikely to match that of the local tacacs0 thru tacacs15 user.3.7.0-3.7.16, 4.0.0-4.4.5, 5.0.0-5.4.0
3301988
Some EVPN multihoming show commands might cause BGP to crash if you use the json flag and attempt to reference the default VRF by name. For example, show bgp l2vpn evpn es-vrf json.5.0.0-5.3.15.4.0
3235368
When you try to configure VRF route leaking between many VRFs using multiple NCLU commands before running the net commit command, the commit fails. To work around this issue, configure VRF leaking one command at a time and run net commit after each command.4.4.4-5.2.15.3.0-5.4.0
3228899
None		If two FDB entries are added in hardware with a single API call (at the same time), when one entry already exists in hardware and the additional entry has a tunnel type, the resulting FDB entry might be configured improperly in hardware. This can cause corruption of the packets that match the FDB entry.4.4.0-4.4.2, 5.0.0-5.0.14.4.3-4.4.5, 5.1.0-5.4.0
3227677
When daylight saving time changes the time, the MLAG initDelay timer resets and all MLAG bonds go down.4.4.4-5.2.15.3.0-5.4.0
3216922
None		RADIUS authenticated users with read-only access to NCLU commands (users in the users_with_show list) can run edit commands if a username for a non-local account is on the users_with_edit line of the /etc/netd.conf file. To work around this issue, make sure that all usernames on the users_with_edit line of the /etc/netd.conf file are configured local users for the system (real Linux users).3.7.0-5.2.15.3.0-5.4.0
3211359
The net show interface detail command output shows Type=Unknown for the specified interface.4.4.3-5.0.15.1.0-5.4.0
3211054
On the NVIDIA Spectrum-2 switch, when receiving multicast traffic on a PIM enabled VLAN, the multicast traffic is forwarded correctly to the associated VLAN, however WJH shows traffic loss with the error:

Packet size is larger than router interface MTU – Validate the router interface MTU configuration
4.4.2-5.2.15.3.0-5.4.0
3200373
After rebooting the switch, the IPv6 link local address for an SVI that belongs to non-default VRF is missing, and doesn’t show on the switch. To resolve this issue, run the ifreload -a command.5.0.0-5.2.15.3.0-5.4.0
3195345
Communication between single-connected MLAG hosts on different switches fails because packets received by single-connected MLAG hosts are not forwarded over the peer link. To work around this issue, when adding a switch to an MLAG pair, enable all the interfaces.5.0.0-5.0.15.1.0-5.4.0
3192808
None		When the switch receives an LLDP frame from a Cisco router right after a ptmd restart, the ptmd service crashes.4.3.0-5.2.15.3.0-5.4.0
3157240
When you try to query REDECN counters with the mlxcmd utility on a bond member port with the following commands, syslog reports an error
sudo /usr/lib/cumulus/mlxcmd roce counters –port sudo /usr/lib/cumulus/mlxcmd qos counters –clear –port
4.4.4-5.1.05.2.0-5.4.0
3150317
During a host failure, where a link remains up but LACP stops being sent, the EVPN multihoming ES bond goes into bypass mode active without a link state change.4.4.2-5.2.15.3.0-5.4.0
3142615
The BGP4-MIB.txt file is missing from Net-SNMP in Cumulus Linux 5.0.0 through 5.2.1 and 5.4.0.5.0.0-5.4.0
3138746
The switch duplicates DHCP packets that pass through the VTEP.4.3.0-5.1.05.2.0-5.4.0
3138057
When the next hop interface for EVPN type 5 routes flaps, FRR might uninstall the routes and Route install failed appears in /var/log/frr/frr.log. To work around this problem, restart FRR with the sudo systemctl restart frr command.4.4.0-5.2.15.3.0-5.4.0
3131423
During EVPN multihoming bond failover, ARP and ND redirection fails if you configure layer 2 VNIs and ES bonds before you configure the loopback IP address of the switch. To work around this issue, configure the loopback IP address, then restart FRR with the systemctl restart frr command.4.3.0-5.1.05.2.0-5.4.0
3123556
When you configure an interface in FRR to send IPv6 RAs before you configure the interface in the /etc/network/interfaces file, the switch does not process IPv6 RAs. To work around this issue, remove the interface configuration in FRR and reapply it.3.7.15-4.3.0, 4.4.0-5.1.04.3.1, 5.2.0-5.4.0
3119673
If the switch receives an EVPN route with multiple RTs that match the import policy for a local VNI, the bgpd service crashes.5.0.0-5.1.05.2.0-5.4.0
3119615
In an MLAG topology, if you admin down a single connected interface, any dynamic MAC addresses on the peer link are flushed, then added back momentarily, which creates a disruption in traffic.3.7.15-5.1.05.2.0-5.4.0
3117340
When you edit the /usr/share/openvswitch/scripts/ovs-ctl-vtep file to change the ovs-vtepd configuration between vlan-aware and vlan-unaware mode, ovs-vtepd crashes when you restart the service. To recover, restart the networking service with the sudo systemctl restart networking command.4.3.0-5.1.05.2.0-5.4.0
3115415
In the Cumulus-BGPVRF-MIB, the bgpPeerFsmEstablishedTime OID does not correctly report the time since a BGP session goes down.4.4.4-5.1.05.2.0-5.4.0
3112971
When you configure a VRF static route using the legacy command syntax in FRR (for example: ip route 10.0.0.0/8 172.16.1.1 vrf vrf-red), then make subsequent VRF or route configuration changes, FRR might crash. To avoid this problem, use the current method for configuring VRF routes within the VRF stanza:
vrf vrf-red
 ip route 10.0.0.0/8 172.16.1.1 vrf vrf-redend vrf
4.4.3-5.1.05.2.0-5.4.0
3112938
In the Cumulus-BGPVRF-MIB, the bgpPeerFsmEstablishedTransitions OID always reports a value of 0.4.4.4-5.1.05.2.0-5.4.0
3084476
QOS traffic shaping doesn’t restore the default configuration after you disable traffic shaping in the /etc/cumulus/datapath/qos/qos_features.conf file. To work around this issue, restart switchd.4.4.3, 5.0.0-5.4.04.4.4-4.4.5
3084027
Under a high load, you might see ingress drop counters increase. The drops are classified as HwIfInDiscards in ethtool and shown as ingress_general in hardware.4.3.0-4.4.5, 5.0.0-5.4.0
3081232
On the NVIDIA Spectrum 1 switch, when a port goes down, it might not come back up. To work around this issue, disable, then enable the port.5.0.0-5.2.14.4.4-4.4.5, 5.3.0-5.4.0
3066664
In an EVPN-MH configuration, the switch fails to redirect tagged frames with the CoS bits set.4.4.0-4.4.3, 5.0.0-5.4.04.4.4-4.4.5
3059135
In an OSPF configuration, after you change the IPv6 subnet mask, the old address remains in the RIB as a connected OSPF route
To resolve this issue, restart FRR with the sudo systemctl restart frr command.		4.3.0-5.1.05.2.0-5.4.0
3054869
When you run NVUE commands as part of ZTP scripts, the commands fail with errors that indicate a missing $HOME environment variable. The issue has been fixed where the ZTP module initializes the $HOME environment variable before launching the ZTP scripts. However, if you are running older releases, before you use any NVUE commands in the ZTP script, add a section and define the HOME environment variable. Populate the variable with the default expected root user home directory value (/root), then export the HOME variable so it is available globally for NVUE to use
HOME=/rootexport HOME
5.0.0-5.1.05.2.0-5.4.0
3053197
The cl-resource-query command output shows ECMP nextHop Table exhaustion (above 100 percent utilization) and the switchd.log file contains ECMP resource errors with routes and next hops failing to install.4.2.1-4.4.5, 5.0.0-5.4.0
3046023
The cl-resource-query command output shows ECMP nextHop Table exhaustion (above 100 percent utilization) and the switchd.log file contains ECMP resource errors with routes and next hops failing to install.4.2.1-5.1.05.2.0-5.4.0
3041307
If you update the MAC address of an SVI using ifreload and hwaddress, the kernel maintains a stale permanent fdb entry for the old MAC address.3.7.15, 4.3.0, 4.4.0-4.4.3, 5.0.0-5.0.13.7.16, 4.3.1, 4.4.4-4.4.5, 5.1.0-5.4.0
3040080
On Spectrum-2 switches, when a packet has a CRC and the ports are in cut-though mode, the switch might stop forwarding traffic.4.4.2-4.4.3, 5.0.0-5.0.14.4.4-4.4.5, 5.1.0-5.4.0
3037824
The NVUE nv show interface link state command shows an empty table instead of showing the port link state.5.0.0-5.3.15.4.0
3032234
In BGP unnumbered, when you try to remove an interface from the underlay default VRF with the NVUE nv unset vrf default router bgp neighbor command, the command fails to apply.4.4.2-5.0.15.1.0-5.4.0
3021897
After you remove the port from the EVPN-MH bond, the port stays in the PRTDN state with the protodown flag ON.4.4.3, 5.0.0-5.0.14.4.4-4.4.5, 5.1.0-5.4.0
3021838
PBR rules that you apply to interfaces in the default VRF install in the kernel with the action lookup local. As a result, packets that match this rule only perform a route lookup in the local table (which contains special routes for local IP addresses and broadcast addresses) but not in the main table (which contains unicast routes). As a result, policy routing might be applied to traffic incorrectly.4.4.2-5.0.15.1.0-5.4.0
3021696
When you run the /usr/share/snmp/resq_pp.py script used by SNMP, you see the following log message in syslog regardless of the forwarding table profile set in the /etc/cumulus/datapath/traffic.conf file.4.4.0-4.4.3, 5.0.0-5.0.14.4.4-4.4.5, 5.1.0-5.4.0
3021693
When ARP suppression is off, Cumulus Linux sends GARPs from neighmgrd for remote neighbors over VXLAN.3.7.15-4.3.0, 4.4.0-4.4.3, 5.0.0-5.1.04.3.1, 4.4.4-4.4.5, 5.2.0-5.4.0
3017127
After you convert a port from a layer 2 bond member to a layer 3 port, the switch drops transmitted untagged packets as egress VLAN membership discards
To work around this issue, restart switchd with the sudo systemctl restart switchd.service command.		4.4.2-4.4.3, 5.0.0-5.4.04.4.4-4.4.5
3014664
On the NVIDIA SN3420 switch, the smonctl command output shows the maximum PSU temperature higher than the critical temperature.4.4.2-4.4.3, 5.0.0-5.4.04.4.4-4.4.5
3008388
When you set vlan-bridge-binding on for a VLAN interface, the VLAN interface status does not change to down even when all bridge member ports are down.4.4.3-5.0.15.1.0-5.4.0
3007020
The sudo smonctl command output shows an error for the ASIC temperature sensor (temp6).5.0.0-5.0.15.1.0-5.4.0
3003167
Updating an existing tunnel configuration with NVUE or directly in the /etc/network/interfaces file causes traffic loss. The original tunnel is destroyed and then recreated (with a new ifindex)
The new behavior will make sure to apply the configuration delta without disrupting any traffic as much as possible. Note that a tunnel mode change can’t be applied without causing traffic loss.		5.0.0-5.0.15.1.0-5.4.0
2999253
If you remove NGINX from the switch, then run apt autoremove, switchd does not reload. This occurs because removing NGINX also removes the libyaml-0-2 and python-yaml packages, which are required for the switchd consistency check.5.0.0-5.0.15.1.0-5.4.0
2999243
sFlow fails to send flow samples.5.0.0-5.0.15.1.0-5.4.0
2994402
When you run ifquery as non-root, EVPN multihoming bond configuration fails
To work around this issue, always use sudo when running ifupdown2 commands (ifup, ifreload, ifdown, and ifquery).		4.4.2-5.0.15.1.0-5.4.0
2993719
After you delete the last vxlan-remoteip configuration line from the /etc/network/interfaces file and run the ifreload -a command, the corresponding BUM flood entry is not removed.3.7.15-5.0.15.1.0-5.4.0
2972540
With RADIUS enabled for user shell authentication, there might be a delay in local user authentication for non cumulus user accounts.5.0.0-5.4.0
2964279
When a VNI flaps, an incorrect list of layer 2 VNIs are associated with a layer 3 VNI. The NCLU net show evpn vni detail command output shows duplicate layer 2 VNIs under a layer 3 VNI.3.7.15, 4.4.2-4.4.5, 5.0.0-5.4.03.7.16
2957968
After you install the RADIUS libnss-mapuser package, the nvued service fails to start.5.0.0-5.0.15.1.0-5.4.0
2951110
The net show time ntp servers command does not show any output with management VRF.3.7.15-3.7.16, 4.1.1-4.4.5, 5.0.0-5.4.0
2949123
The NVUE command nv show service ntp mgmt server does not show any configured servers.5.0.0-5.2.15.3.0-5.4.0
2943443
Cumulus Linux lets you add more than one VXLAN interface to same VLAN on the same bridge. This is an invalid configuration as certain Cumulus Linux components, such as switchd, expect a single VNI for a given bridge or VLAN.3.7.15, 4.2.1-4.3.0, 4.4.2-5.0.13.7.16, 4.3.1, 5.1.0-5.4.0
2943080
The overlay ASN is removed after a route flap.4.4.0-5.0.15.1.0-5.4.0
2939231
If you use NVUE to configure selective route leaking to exclude certain prefixes, the route map fails to apply when you run the nv config apply command.5.0.0-5.0.15.1.0-5.4.0
2933466
You cannot run NVUE commands to configure route leaking. To work around this issue, create a snippet in yaml format and add the configuration to the /etc/frr/frr.conf file.4.4.0-5.0.15.1.0-5.4.0
2914835
NVUE flexible snippets create invalid YAML files.5.0.0-5.0.15.1.0-5.4.0
2913859
ECMP error messages, similar to the following, show in log files:
Dec 15 10:01:35 leaf01 switchd3431: hal_mlx_sdk_nexthop_wrap.c:361 ERR ECMP: cmd CREATE failed: No More Resources, nexthops 1Dec 15 10:01:35 leaf01 switchd3431: hal_mlx_sdk_nexthop_wrap.c:621 ERR ECMP: failed to CREATE static ecmp in hwDec 15 10:01:35 leaf01 switchd3431: hal_mlx_sdk_nexthop_wrap.c:656 ERR ECMP: cmd CREATE failed: No More Resources, nexthops 1Dec 15 10:01:35 leaf01 switchd3431: hal_mlx_ecmp.c:1540 ERR ECMP: failed to allocate hw ecmp status No More ResourcesDec 15 10:01:35 leaf01 switchd3431: hal_mlx_ecmp.c:1561 ERR ECMP: error allocating static ecmpDec 15 10:01:35 leaf01 switchd3431: hal_mlx_ecmp.c:2207 ERR ECMP: failed to find ecmp container
4.4.0-5.0.15.1.0-5.4.0
2910017
SNMP reports the same ifType of ethernetCsmacd(6) for loopback interfaces.3.7.15-4.4.2, 5.0.0-5.4.04.4.3-4.4.5
2908541
Running apt dist-upgrade causes switchd to stop and never start again. Do not use apt dist-upgrade; use apt upgrade instead. Cumulus Linux does not support apt dist-upgrade
To work around this issue, if you run apt dist-upgrade and switchd no longer works, run the apt install sx-sdk-eth-dev command (and run the command for any other removed package) or reinstall the Cumulus Linux image.		5.0.05.0.1-5.4.0
2904450
When you run the ethtool -m or the l1-show command, the 400G interface optical values do not show.4.4.0-4.4.5, 5.0.0-5.4.0
2903374
The nv show interfaces command returns a 500 error and syslog shows a python error, triggered by third party devices (non CL) missing LLDP fields
To work around this issue, disable LLDP on a single interface.		5.0.0-5.0.15.1.0-5.4.0
2898044
NVUE commands including the nv config apply command might fail with the following error because the /etc/resolv.conf file is missing
Failed to prepare to applyUnrecoverable internal error
5.0.0-5.0.15.1.0-5.4.0
2891255
CVE-2021-39925: Buffer overflow in the Bluetooth SDP dissector in Wireshark 3.4.0 to 3.4.9 and 3.2.0 to 3.2.17 allows denial of service via packet injection or crafted capture file
Vulnerable: <= 2.6.20-0+deb10u1Fixed: 2.6.20-0+deb10u2		4.0.0-4.4.1, 5.0.0-5.4.04.4.2-4.4.5
2890681
CVE-2021-42771: relative path traversal in Babel, a set of tools for internationalising Python applications, could result in the execution of arbitrary code
Vulnerable: 2.6.0+dfsg.1-1Fixed: 2.6.0+dfsg.1-1+deb10u1		4.0.0-4.4.1, 5.0.0-5.4.04.4.2-4.4.5
2886488
NVUE commands fail to configure port mirroring.5.0.0-5.0.15.1.0-5.4.0
2886476
If you enable or disable the advertise primary IP address setting when originating EVPN default type-5 routes, the default route or prefix originated from one of the MLAG peers sends a null layer 3 VNI, which prevents the remote VTEP from installing the default route.5.0.0-5.1.05.2.0-5.4.0
2885287
When you change the port breakout configuration, you must restart switchd to clean up any previously-associated port states and reinitialize the ports. Reloading switchd does not work.5.0.0-5.0.15.1.0-5.4.0
2875338
In a scaled EVPN-MLAG configuration (observed with 400 or more VNIs and 20K or more MAC addresses – the actual scale might vary), when the peer link flaps causing all VNIs to come up at the same time, there might be high CPU utilization on the system for several minutes and the FRR service might restart. After FRR restarts or the CPU utilization settles down, the system functions normally.4.2.1-4.3.0, 4.4.0-5.0.13.7.16, 4.3.1, 5.1.0-5.4.0
2867248
The validate-ports -d command does not return the correct speeds for ports. Use the speeds specified in the /etc/cumulus/ports.conf file.5.0.0-5.1.05.2.0-5.4.0
2867042
When connecting the SN4600V to an SNxxxx system, it must run in auto-negotiation mode (not force mode) otherwise the wrong Tx configuration might be chosen.5.0.0-5.4.0
2861989
Incomplete or unnecessary configuration in FRR results in FRR restarting instead of rejecting the configuration with an error.5.0.0-5.0.15.1.0-5.4.0
2860323
If two FDB entries are added in hardware with a single API call (at the same time), when one entry already exists in hardware and the additional entry has a tunnel type, the resulting FDB entry might be configured improperly in hardware. This can cause corruption of the packets that match the FDB entry.4.4.0-5.0.15.1.0-5.4.0
2859015
In a static VXLAN configuration with a traditional VXLAN device, enabling bridge learning on the VNI leads to an incorrect warning and the setting is removed in the next commit. The warning is similar to the following:
warning: vni10: possible mis-configuration detected: l2-vni configured with bridge-learning ON while EVPN is also configured - these two parameters conflict with each other
5.0.0-5.4.0
2855908
Traffic failover in a multicast topology with redundancy has the mroute stuck in a prune state and PIM join messages continue to send. To work around this issue, run the vtysh clear ip mroute command.3.7.15-4.3.0, 5.0.0-5.4.04.3.1-4.4.5
2847919
Configuring a router with the REST API through the switch front panel ports (swps) is supported in the default VRF only
To work around this issue, use the localHost IP address or the MGMT IP address to configure router using the Rest API.		5.0.0-5.4.0
2847755
When you use NCLU to remove the configuration for a peer that is a member of a group but also has other peer-specific configuration, you must remove the peer-specific configuration before you delete the peer in a separate NCLU commit.5.0.0-5.4.0
2831968
The switch duplicates DHCP packets that pass through the VTEP.4.3.0, 4.4.0-4.4.5, 5.0.0-5.4.04.3.1
2823307
Cumuls Linux does not support a bond with more than 64 ports. Any configuration with more than 64 ports in a bond changes all ports to down when you apply the configuration.5.0.0-5.4.0
2821929
FRR restarts even when the NVUE configuration overwrite mode is set.5.0.0-5.3.15.4.0
2815646
In an EVPN configuration, an FRR restart on a border leaf VRRP master causes a stale route for the VRRP VIP on some remote VTEPs to point to the VRRP backup after convergence.3.7.12-3.7.15, 4.3.0, 4.4.2-5.0.13.7.16, 4.3.1, 5.1.0-5.4.0
2812075
When you configure PIM, you can either configure RP mappings for different multicast groups or use a prefix list to specify the RP to group mapping. You cannot use the two methods together.5.0.0-5.1.05.2.0-5.4.0
2743186
When you use MD5 passwords and you configure a non-default VRF before the default VRF in the /etc/frr/frr.conf file, numbered BGP sessions do not establish.3.7.15-5.1.05.2.0-5.4.0
2736108
When you change the VRRP advertisement interval on the master, the master advertisement interval field in the show vrrp command output does not show the updated value.4.4.0-4.4.5, 5.0.0-5.4.0
2734103
ACL [No More Resources] messages keep appearing and you can’t reinstall the ACL.4.3.0-5.1.05.2.0-5.4.0
2713888
With the ip-acl-heavy TCAM profile, the following message might appear after you install an ACL with NCLU or cl-acltool and the ACL might not work correctly
hal_flx_acl_util.c:378 ERR hal_flx_acl_resource_release resource region 0 size 7387 create failed: No More Resources
To work around this issue, change the TCAM profile to acl-heavy or ip-acl-heavy with ACL non-atomic mode.		3.7.15-5.0.15.1.0-5.4.0
2705056
SVIs do not inherit the pinned MAC address of the bridge.4.3.0, 5.0.0-5.4.04.3.1-4.4.5
2701000
A default route learned from DHCP on eth0 in the management VRF might install in the default VRF if eth0 is disconnected and the original next hop is reachable in the default VRF. To work around this issue, delete the DHCP lease file for eth0 with the sudo rm /var/lib/dhcp/dhclient.eth0.leases command.4.3.0, 5.0.0-5.4.04.3.1-4.4.5
2685994
When you use the NVUE command nv set interface lo router ospf area to configure OSPF on a loopback interface, the configuration fails to apply
To work around this issue, configure the loopback interface in the desired OSPF area with the nv set vrf default router ospf area 0 network command and reference the assigned prefix of the loopback interface. For example:
cumulus@leaf01:~$ nv set vrf default router ospf area 0 network 10.10.10.1/32
4.0.0-5.0.15.1.0-5.4.0
2684925
The NVUE nv show vrf default router bgp peer command produces a 404 not found error.4.4.0-4.4.5, 5.0.0-5.4.0

Fixed Issues in 5.0.0

Issue IDDescriptionAffects
3108491
None		In EVPN deployments, a buffer lockup for split or pre-split ports can occur on Spectrum-2 and Spectrum-3 switches. As result, traffic coming in on these ports is dropped in the RX buffer. To work around this issue, restart switchd.4.2.1-4.4.5
2873186
In an MLAG configuration with traditional bridges, MAC addresses are seen over peer link during ifreload when adding new VLANS or bridges.3.7.14.2-3.7.15, 4.3.0-4.4.5
2862211
On NVIDIA Spectrum ASICs in a layer 2 bridge scaled configuration (more than 800 VLANs), clagd.service enters a failed state after a reboot or a switchd restart
To work around this issue, load the port configuration in a staggered manner (groups of five downlink ports).		3.7.12-3.7.15, 4.3.0, 4.4.2-4.4.5
2847618
When you enable PIM on VLAN interfaces, multicast throughput might not achieve line rate depending on packet sizes in the multicast flow.
2845531
If you update the MAC address of an SVI when the SVI is in a protodown state (for example, when no bridge ports that carry this VNI are operationally up or if the MAC address of the SVI’s parent bridge changes), clagd does not notice the change. The MLAG peer incorrectly maintains a PERMANENT neighbor entry for the SVI IP that points to the old MAC address.4.2.1-4.4.5
2841584
After you upgrade Cumulus Linux on one of the MLAG peers, the bonds do not come up and the reason shows anycast-ip-mismatch even though there is no VXLAN configuration on the switch. To work around this issue, configure an anycast IP address under the loopback interface on both switches in the MLAG pair.4.4.2-4.4.5
2840817
CVE-2021-25219: The lame server cache in BIND, a DNS server implementation, can be abused by an attacker to significantly degrade resolver performance, resulting in denial of service (large delays for responses for client queries and DNS timeouts on client hosts).4.0.0-4.3.0
2839140
After building VLAN or VXLAN interfaces, MLAG becomes unstable.4.3.0-4.4.1
2835817
Multicast packets are not seen on a SPAN port.
2826121
When you configure 199 VXLANs plus 199 VLANs, clagd crashes every few seconds.3.7.15, 4.3.0, 4.4.0-4.4.1
2821869
The cl-route-check –layer3 command fails with a memory error. For example:
cumulus@switch:~$ sudo cl-route-check –layer3Traceback (most recent call last):
File “/usr/cumulus/bin/cl-route-check”, line 1270, in 
 routing.collect_data()
File “/usr/cumulus/bin/cl-route-check”, line 528, in collect_data
 self.collect_data_bgp_ipv4()
File “/usr/cumulus/bin/cl-route-check”, line 711, in collect_data_bgp_ipv4
 bgp_ipv4 = json.loads(output)
File “/usr/lib/python2.7/json/init.py”, line 338, in loads
 return _default_decoder.decode(s)
File “/usr/lib/python2.7/json/decoder.py”, line 366, in decode
 obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File “/usr/lib/python2.7/json/decoder.py”, line 382, in raw_decode
 obj, end = self.scan_once(s, idx)MemoryError
3.7.15-4.4.5
2820565
SNMP does not start and you see errors similar to the following:
cumulus@switch:~$ sudo systemctl status snmpd.service snmpd.service - Simple Network Management Protocol (SNMP) Daemon.
  Loaded: loaded (/lib/systemd/system/snmpd.service; enabled; vendor preset: enabled)
  Active: failed (Result: exit-code) since Mon 2021-10-11 14:38:13 UTC; 1min 8s ago
 Process: 1987 ExecStart=/usr/sbin/snmpd $SNMPDOPTS -f (code=exited, status=1/FAILURE)
Main PID: 1987 (code=exited, status=1/FAILURE)
To work around this issue, run the sudo systemctl restart snmpd.service command.		4.3.0-4.4.5
2813563
When you change the port speed with the NVUE nv set interface link speed command, then run nv config apply, the port is disabled. To work around this issue, run the ifreload -a command after you apply the port speed setting.4.4.0-4.4.5
2803428
The clagctl -v -j and net show clag verbose json commands show incorrect output.4.4.0-4.4.5
2803028
Restarting switchd might fail due to an ACL SPAN module initialization failure.4.4.2-4.4.3
2799575
When next hop tracking fails for a global next hop, BGP invalidates the entire path instead of only invalidating the global next hop.4.4.0-4.4.5
2799568
When you add or remove a global unicast address from an interface, BGP does not update the global next hop advertised to the unnumbered BGP peer.4.4.0-4.4.5
2798406
If an MLAG failure of an EVPN Active-Active VTEP pair occurs after you disable EVPN Advertise Primary IP Address, remote VTEPs might not be able to install the anycast RMAC of the failed MLAG peers or the related bridge FDB entry
To work around this issue, do not disable EVPN Advertise Primary IP Address, which is enabled by default when you use address-virtual for layer 3 VNI SVI interfaces.		4.4.0-4.4.5
2794766
The Mellanox 3700C switch reports a slow memory leak in sx_sdk. Memory increases by about 240B/hour and does not free up.4.3.0-4.4.5
2792616
If a neighbor entry (ARP or NDP) is used as a next hop of a route that is synchronized into hardware, the neighbor entry is not removed from hardware after the neighbor is no longer reachable. As a result, routed traffic matching this prefix is incorrectly hardware forwarded through the stale neighbor information.4.3.0-4.4.5
2781537
In Cumulus VX, the iptables FORWARD chain does not count hits. To work around this issue, use -t mangle -A PREROUTING instead of FORWARD.4.3.0-4.4.5
2780915
In NVUE, you can’t deactivate the IPv4 address family per neighbor.4.4.0-4.4.5
2780834
To enable an address family on a peer, you have to enable the address family globally.4.4.0-4.4.5
2780211
When you use the NVUE nv set vrf default router bgp peer local-as asn command to configure a local AS, Cumulus Linux does not update the etc/frr/frr.conf file.4.4.0-4.4.5
2755615
When route_preferred_over_neigh is set to FALSE in the /etc/cumulus/switchd.conf file, host routes (/32 or /128) are used for forwarding in hardware instead of a local neighbor entry.4.0.0-4.3.0, 4.4.0-4.4.1
2753955
On the Lenovo MSN3700 switch, if you try to configure an interface with a link speed of 200G, the configuration fails.4.2.1-4.4.5
2752330
With BGP and layer 2 forwarding, Smart System Manager warm boot mode can cause packet loss.4.4.0-4.4.5
2747750
Links connected between a Spectrum 2 switch configured for warm boot and Spectrum 3 switches configured for cold boot might not come up when the switches are booted.4.4.2-4.4.5
2739402
The destination MAC address of ERSPAN GRE packets is set to all zeros.4.3.0-4.4.5
2736249
If you configure BGP graceful restart in the /etc/frr/frr.conf file, then apply the configuration with systemctl reload frr, the configuration fails to apply and you see the following error:
Job for frr.service failed
See “systemctl status frr.service” and “journalctl -xe” for details.
2736244
When you run the vtysh command to enable BGP graceful restart on a peer multiple times, the command fails with the following error:
% The Graceful Restart command used is not valid at this moment.
4.4.0-4.4.5
2734275
On NVIDIA Spectrum-1, -2, and -3 switches, the decode-syseeprom command does not return the correct value
cumulus@switch:~$  decode-syseeprom -t psu1Device is not ready: absent
2734119
The ESI line in the show bgp l2vpn evpn route command output always shows VNI: 0. This is a cosmetic software issue.4.3.0-4.4.5
2732587
The bridge MAC address is updated during a port change on bridge interfaces.4.3.0, 4.4.0-4.4.5
2728119
When VRF devices are deleted and reconfigured (for example, during a networking service restart), dynamic BGP neighbors might fail to reestablish. To work around this issue, restart FRR with the sudo systemctl restart frr command.4.3.0-4.4.5
2698649
When configuring a single VXLAN device in the /etc/network/interfaces file, if you edit the multicast group address in vxlan-mcastgrp-map, then revert the change, the change does not take effect.4.4.0-4.4.5
2687344
On the NVIDIA SN3700 switch, the decode-syseeprom shows device absent for a PSU that is present.4.4.0-4.4.5
2599274
On Mellanox Spectrum switches, when there is an MSTP forwarding state change on a bonds (for example, when the state changes from blocking to forwarding), the MSTP hardware table might set some VLANs to blocking when they should be forwarding. A a result, all packets on these VLANs drop at ingress
To recover from this state, flap the bond interface (not the physical swp) by running ifdown <bond_name> ; sleep 1 ; ifup <bond_name>.		4.3.0-4.4.5
2556811
CM-33416		Under certain high scale conditions, various modules might experience timetouts during cl-support collection, which results in missing data in the cl-support file.3.7.12-3.7.15, 4.1.1-4.3.0
2556039
CM-33013		Cumulus Linux learns remote MAC addresses as local entries on the bridge with the wrong remote VTEP IP address even when bridge learning is off on the VTEP and ARP suppression is enabled.4.4.0-4.4.3
2555981
CM-32979		In BGP, to enable an address family on a peer, you have to enable the address family globally.4.4.0-4.4.5
2554783
CM-32274		If you apply an outbound route map to a BGP peer that uses set as-path prepend last-as, advertised locally-originated routes have the ASN of the peer prepended to the AS path.
This might trigger AS path loop prevention on the peer, where the peer ignores locally-originated prefixes.		4.2.1-4.4.5