This documentation is for the extended support release (ESR) version of Cumulus Linux. We will continue to keep this content up to date until 21 February, 2023, when ESR support ends. For more information about ESR, please read this knowledge base article.

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Comparing NCLU and vtysh Commands

Using NCLU is the primary way to configure routing in Cumulus Linux. However, an alternative exists in vtysh modal CLI. The available commands are as follows:

The following table compares the various FRRouting commands with their Cumulus Linux NCLU counterparts.

NCLU CommandsFRRouting Commands
Display the routing tablecumulus@switch:~$ net show routeswitch# show ip route
Create a new neighborcumulus@switch:~$ net add bgp autonomous-system 65002
cumulus@switch:~$ net add bgp neighbor
switch(config)# router bgp 65002
switch(config-router)# neighbor
Redistribute routing information from static route entries into RIP tablescumulus@switch:~$ net add bgp redistribute staticswitch(config)# router bgp 65002
switch(config-router)# redistribute static
Define a static routecumulus@switch:~$ net add routing route bridge 45switch(config)# ip route bridge 45
Configure an IPv6 addresscumulus@switch:~$ net add interface swp3 ipv6 address 3002:2123:1234:1abc::21/64switch(config)# int swp3
switch(config-if)# ipv6 address 3002:2123:1234:1abc::21/64
Enable topology checking (PTM)cumulus@switch:~$ net add routing ptm-enableswitch(config)# ptm-enable
Configure MTU in IPv6 network discovery for an interfacecumulus@switch:~$ sudo cl-ra interface swp3 set mtu 9000switch(config)# int swp3
switch(config-if)# ipv6 nd mtu 9000
Set the OSPF interface prioritycumulus@switch:~$ net add interface swp3 ospf6 priority 120switch(config)# int swp3
switch(config-if)# ip ospf6 priority 120
Configure timing for OSPF SPF calculationscumulus@switch:~$ net add ospf6 timers throttle spf 40 50 60switch(config)# router ospf6
switch(config-ospf6)# timer throttle spf 40 50 60
Configure the OSPF Hello packet interval in number of seconds for an interfacecumulus@switch:~$ net add interface swp4 ospf6 hello-interval 60switch(config)# int swp4
switch(config-if)# ipv6 ospf6 hello-interval 60
Display BGP informationcumulus@switch:~$ net show bgp summaryswitch# show ip bgp summary
Display OSPF debugging statuscumulus@switch:~$ net show debugsswitch# show debugging ospf
Show information about the interfaces on the switchcumulus@switch:~$ net show interfaceswitch# show interface

To quickly check important information, such as IP address, VRF, and operational status, in easy to read tabular format:
switch# show interface brief