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Interface

interface


interface {mgmt0 | mgmt1 | lo | vlan<id>} 

Enters a management interface context.

Syntax Description

mgmt0

Management port 0 (out of band)

mgmt1

Management port 1 (out of band)

lo

Loopback interface

vlan<id>

In-band management interface (e.g. vlan10)

Default

N/A

Configuration Mode

config

History

3.1.0000

Example

switch (config)# interface mgmt0
switch (config interface mgmt0)#

Related Commands

show interfaces <ifname>

Notes




ip address


ip address <IP address> <netmask>
no ip address

Sets the IP address and netmask of this interface.
The no form of the command clears the IP address and netmask of this interface.

Syntax Description

IP address

IPv4 address

netmask

Subnet mask of IP address

Default

0.0.0.0/0

Configuration Mode

config interface management

History

3.1.0000

Example

switch (config interface mgmt0)# ip address 10.10.10.10 255.255.255.0

Related Commands

show interfaces <ifname>

Notes

If DHCP is enabled on the specified interface, then the DHCP IP assignment will hold until DHCP is disabled



ip default-gateway


ip default-gateway <next-hop-IP-address> <interface-name>
no default-gateway <next-hop-IP-address> <interface-name>

Configures a default route.
The no form of the command removes the current default route.

Syntax Description

next hop IP address

gateway IP address

interface namedefault gateway interface name

Default

N/A

Configuration Mode

config interface management

History

3.1.0000

3.8.1000Updated Command & Syntax description

Example

switch (config interface mgmt0)# ip default-gateway mgmt1

Related Commands


Notes




alias 


alias <index> ip address < IP address> <netmask>
no alias <index>

Adds an additional IP address to the specified interface. The secondary address will appear in the output of “show interface” under the data of the primary interface along with the alias.
The no form of the command removes the secondary address to the specified interface.

Syntax Description

index

A number that is to be aliased to (associated with) the secondary IP

IP address

Additional IP address

netmask

Subnet mask of the IP address

Default

N/A

Configuration Mode

config interface management

History

3.1.0000

Example

switch (config interface mgmt0)# alias 2 ip address 9.9.9.9 255.255.255.255

Related Commands

show interfaces <ifname>

Notes

  • If DHCP is enabled on the specified interface, then the DHCP IP assignment will hold until DHCP is disabled
  • More than one additional IP address can be added to the interface



mtu


mtu <bytes>
no mtu <bytes>

Sets the Maximum Transmission Unit (MTU) of this interface.
The no form of the command resets the MTU to its default.

Syntax Description

bytes

The entry range is 68-1500.

Default

1500

Configuration Mode

config interface management

History

3.6.3004

Example

switch (config interface mgmt0)# mtu 1500

Related Commands

show interfaces <ifname>

Notes




duplex


duplex <duplex>
no duplex

Sets the interface duplex.
The no form of the command resets the duplex setting for this interface to its default value.

Syntax Description

duplex

Sets the duplex mode of the interface. The following are the possible values:

  • half - half duplex
  • full - full duplex
  • auto - auto duplex sensing (half or full)

Default

auto

Configuration Mode

config interface management

History

3.1.0000

Example

switch (config interface mgmt0)# duplex auto

Related Commands

show interfaces <ifname>

Notes

  • Setting the duplex to “auto” also sets the speed to “auto”
  • Setting the duplex to one of the settings “half” or “full” also sets the speed to a manual setting which is determined by querying the interface to find out its current auto-detected state



speed


speed <speed>
no speed

Sets the interface speed.
The no form of the command resets the speed setting for this interface to its default value.

Syntax Description

speed

Sets the speed of the interface. The following are the possible values:

  • 10 - fixed to 10Mbps
  • 100 - fixed to 1000Mbps
  • 1000 - fixed to 1000Mbps
  • auto - auto speed sensing (10/100/1000Mbps)

Default

auto

Configuration Mode

config interface management

History

3.1.0000

Example

switch (config interface mgmt0)# speed auto

Related Commands

show interfaces <ifname>

Notes

  • Setting the speed to “auto” also sets the duplex to “auto”
  • Setting the speed to one of the manual settings (generally “10”, “100”, or “1000”) also sets the duplex to a manual setting which is determined by querying the interface to find out its current auto-detected state



dhcp


dhcp [renew]
no dhcp

Enables DHCP on the specified interface.
The no form of the command disables DHCP on the specified interface.

Syntax Description

renew

Forces a renewal of the IP address. A restart on the DHCP client for the specified interface will be issued.

Default

Could be enabled or disabled (per part number) manufactured with 3.2.0500

Configuration Mode

config interface management

History

3.1.0000

Example

switch (config interface mgmt0)# dhcp

Related Commands

show interfaces <ifname> configured

Notes

  • When enabling DHCP, the IP address and netmask are received via DHCP hence, the static IP address configuration is ignored
  • Enabling DHCP disables zeroconf and vice versa
  • Setting a static IP address and netmask does not disable DHCP. DHCP is disabled using the “no” form of this command, or by enabling zeroconf.



dhcp hostname


dhcp hostname
no dhcp hostname

Enables fetching the hostname from DHCP for this interface.
The no form of the command disables fetching the hostname from DHCP for this interface.

Syntax Description

N/A

Default

Enabled

Configuration Mode

config interface management

History

3.5.1000

Example

switch (config interface mgmt0)# dhcp hostname

Related Commands

hostname <hostname>
show interfaces <ifname> configured

Notes

  • If a hostname is configured manually by the user, that configuration would override the “dhcp hostname” configuration
  • After upgrading to version 3.5.1000 when a default hostname is not configured, the DHCP server assigns the new hostname for your machine
  • These commands do not work on in-band interfaces



shutdown


shutdown
no shutdown

Disables the specified interface.
The no form of the command enables the specified interface.

Syntax Description

N/A

Default

no shutdown

Configuration Mode

config interface management

History

3.1.0000

Example

switch (config interface mgmt0)# no shutdown

Related Commands

show interfaces <ifname> configured

Notes




zeroconf


zeroconf
no zeroconf

Enables zeroconf on the specified interface. It randomly chooses a unique link-local IPv4 address from the 169.254.0.0/16 block. This command is an alternative to DHCP.
The no form of the command disables the use of zeroconf on the specified interface.

Syntax Description

N/A 

Default

no zeroconf

Configuration Mode

config interface management

History

3.1.0000

Example

switch (config interface mgmt0)# zeroconf

Related Commands

show interfaces <ifname> configured

Notes

Enabling zeroconf disables DHCP and vice versa.



comment 


comment <comment>
no comment

Adds a comment for an interface.
The no form of the command removes a comment for an interface.

Syntax Description

comment

A free-form string that has no semantics other than being displayed when the interface records are listed.

Default

no comment

Configuration Mode

config interface management

History

3.1.0000

Example

switch (config interface mgmt0)# comment my-interface

Related Commands


Notes




ipv6 enable


ipv6 enable
no ipv6 enable

Enables all IPv6 addressing for this interface.
The no form of the command disables all IPv6 addressing for this interface.

Syntax Description

N/A


Default

IPv6 addressing is disabled

Configuration Mode

config interface management

History

3.1.0000

Example

switch (config interface mgmt0)# ipv6 enable

Related Commands

ipv6 address
show interface <ifname>

Notes

  • The interface identifier is a 64-bit long modified EUI-64, which is based on the MAC address of the interface
  • If IPv6 is enabled on an interface, the system will automatically add a link-local address to the interface. Link-local addresses can only be used to communicate with other hosts on the same link, and packets with link-local addresses are never forwarded by a router.
  • A link-local address, which may not be removed, is required for proper IPv6 operation. The link-local addresses start with “fe80::”, and are combined with the interface identifier to form the complete address.



ipv6 address


ipv6 address {<IPv6 address/netmask> | autoconfig [default | privacy]}
no ipv6 {<IPv6 address/netmask> | autoconfig [default | privacy]}

Configures IPv6 address and netmask to this interface, static or autoconfig options are possible.
The no form of the command removes the given IPv6 address and netmask or disables the autoconfig options.

Syntax Description

IPv6 address/netmask

Configures a static IPv6 address and netmask.

Format example: 2001:db8:1234::5678/64.

autoconfig

Enables IPv6 stateless address auto configuration (SLAAC) for this interface. An address will be automatically added to the interface based on an IPv6 prefix learned from router advertisements, combined with an interface identifier.

autoconfig default

Enables default learning routes. The default route will be discovered automatically, if the autoconfig is enabled.

autoconfig privacy

Uses privacy extensions for SLAAC to construct the autoconfig address, if the autoconfig is enabled.

Default

No IP address available, auto config is enabled

Configuration Mode

config interface management

History

3.1.0000

Example

switch (config interface mgmt0)# ipv6 fe80::202:c9ff:fe5e:a5d8/64

Related Commands

ipv6 enable
show interface <ifname>

Notes

  • On a given interface, up to 16 addresses can be configured
  • For Ethernet, the default interface identifier is a 64-bit long modified EUI-64, which is based on the MAC address of the interface



ipv6 dhcp primary-intf


ipv6 dhcp primary-intf <if-name>
no ipv6 dhcp primary-intf

Sets the interface from which non-interface-specific (resolver) configuration is accepted via DHCPv6.
The no form of the command resets non-interface-specific (resolver) configuration.

Syntax Description

if-name

Interface name:

  • lo
  • mgmt0
  • mgmt1

Default

N/A

Configuration Mode

config

History

3.1.0000

Example

switch (config)# ipv6 dhcp primary-intf mgmt0

Related Commands

ipv6 enable
ipv6 address
show interface <ifname>

Notes




ipv6 dhcp stateless


ipv6 dhcp stateless
no ipv6 dhcp stateless 

Enables stateless DHCPv6 requests.
The no form of the command disables stateless DHCPv6 requests.

Syntax Description

N/A

Default

N/A

Configuration Mode

config

History

3.1.0000

Example

switch (config)# ipv6 dhcp stateless

Related Commands

ipv6 enable
ipv6 address
show interface <ifname>

Notes

  • This command only gets DNS configuration, not an IPv6 address
  • The no form of the command requests all information, including an IPv6 address



ipv6 dhcp client enable


ipv6 dhcp client enable
no ipv6 dhcp client enable

Enables DHCPv6 on this interface.
The no form of the command disables DHCPv6 on this interface.

Syntax Description

N/A

Default

ipv6 dhcp client enable

Configuration Mode

config interface management

History

3.7.11xx

Example

switch (config interface mgmt0)# ipv6 dhcp client enable

Related Commands

ipv6 dhcp client renew
show ipv6 dhcp

Notes




ipv6 dhcp client renew


ipv6 dhcp client renew 

Renews DHCPv6 lease for this interface.

Syntax Description

N/A

Default

N/A

Configuration Mode

config interface management

History

3.7.11xx

Example

switch (config interface mgmt0)# ipv6 dhcp client renew

Related Commands

ipv6 dhcp client enable
show ipv6 dhcp

Notes




show interfaces mgmt0


show interface mgmt0 

Displays information on the management interface configuration and status.

Syntax Description

N/A

Default

N/A

Configuration Mode

Any command mode

History


3.1.0000


3.6.8008

Updated Example

Example

switch (config)# show interfaces mgmt0

Interface mgmt0 status:
  Comment         :
  Admin up        : yes
  Link up         : yes
  DHCP running    : yes
  IP address      : 10.12.67.33
  Netmask         : 255.255.255.128
  IPv6 enabled    : yes
  Autoconf enabled: no
  Autoconf route  : yes
  Autoconf privacy: no
  DHCPv6 running  : yes (but no valid lease)
  IPv6 addresses  : 1

  IPv6 address:
    fe80::268a:7ff:fe53:3d8e/64

  Speed           : 1000Mb/s (auto)
  Duplex          : full (auto)
  Interface type  : ethernet
  Interface source: bridge
  MTU             : 1500
  HW address      : 24:8A:07:53:3D:8E

  Rx:
    2055054  bytes
      28830  packets
          0  mcast packets
          0  discards
          0  errors
          0  overruns
          0  frame

  Tx:
    377716  bytes
      3200  packets
         0  discards
         0  errors
         0  overruns
         0  carrier
         0  collisions
         0  queue len

Related Commands


Notes




show interfaces mgmt0 brief


show interface mgmt0 brief

Displays brief information on the management interface configuration and status.

Syntax Description

N/A 

Default

N/A

Configuration Mode

Any command mode

History


3.1.0000


3.6.8008

Updated Example

Example

switch (config)# show interfaces mgmt0 brief

Interface mgmt0 status:
  Comment         :
  Admin up        : yes
  Link up         : yes
  DHCP running    : yes
  IP address      : 10.12.67.33
  Netmask         : 255.255.255.128
  IPv6 enabled    : yes
  Autoconf enabled: no
  Autoconf route  : yes
  Autoconf privacy: no
  DHCPv6 running  : yes (but no valid lease)
  IPv6 addresses  : 1

  IPv6 address:
    fe80::268a:7ff:fe53:3d8e/64

  Speed           : 1000Mb/s (auto)
  Duplex          : full (auto)
  Interface type  : ethernet
  Interface source: bridge
  MTU             : 1500
  HW address      : 24:8A:07:53:3D:8E

Related Commands


Notes




show interfaces mgmt0 configured


show interface mgmt0 configured

Displays configuration information about the specified interface.

Syntax Description

N/A 

Default

N/A

Configuration Mode

Any command mode

History



3.1.0000


3.5.1000

Updated Example with “DHCP Hostname”

3.6.8008

Updated Example

Example

switch (config)# show interfaces mgmt0 configured

Interface mgmt0 configuration:
  Comment         :
  Enabled         : yes
  DHCP            : yes
  DHCP Hostname   : yes
  Zeroconf        : no
  IP address      :
  Netmask         :
  IPv6 enabled    : yes
  Autoconf enabled: no
  Autoconf route  : yes
  Autoconf privacy: no
  DHCPv6 enabled  : yes
  IPv6 addresses  : 0
  Speed           : auto
  Duplex          : auto
  MTU             : 1500

Related Commands


Notes


Hostname Resolution

hostname


hostname <hostname>
no hostname

Sets a static system hostname.
The no form of the command clears the system hostname.

Syntax Description

hostname

A free-form string

Default

Default hostname

Configuration Mode

config

History


3.1.0000


3.6.3004

Added support for the character “.”

Example

switch (config)# hostname my-switch-hostname

Related Commands

show hosts

Notes

  • Hostname may contain letters, numbers, periods (‘.’), and hyphens (‘-’), in any combination
  • Hostname may be 1-63 characters long
  • Hostname may not begin with a hyphen
  • Hostname may not contain other characters, such as “%”, “_” etc.
  • Hostname may not be set to one of the valid logging commands (i.e. debug-files, fields, files, format, level, local, monitor, receive, trap)
  • Changing the hostname stamps a new HTTPS certificate



ip name-server


ip name-server <IPv4/IPv6 address>
no ip name-server <IPv4/IPv6 address>

Sets the static name server.
The no form of the command clears the name server.

Syntax Description

IPv4/v6 address

IPv4 or IPv6 address.

Default

No server name

Configuration Mode

config

History

3.1.0000

Example

switch (config)# ip name-server 9.9.9.9

Related Commands

show hosts

Notes




ip domain-list


ip domain-list <domain-name>
no ip domain-list <domain-name>

Sets the static domain name.
The no form of the command clears the domain name.

Syntax Description

domain-name

The domain name in a string form.
A domain name is an identification string that defines a realm of administrative autonomy, authority, or control in the Internet.

Default

No static domain name

Configuration Mode

config

History

3.1.0000

Example

switch (config)# ip domain-list mydomain.com

Related Commands

show hosts

Notes




ip/ipv6 host


{ip | ipv6} host <hostname> <ip-address>
no {ip | ipv6} host <hostname> <ip-address>

Configures the static hostname IPv4 or IPv6 address mappings.
The no form of the command clears the static mapping.

Syntax Description

hostname

The hostname in a string form

IP Address

The IPv4 or IPv6 address

Default

No static domain name

Configuration Mode

config

History

3.1.0000

Example

switch (config)# ip host my-host 2.2.2.2
switch (config)# ipv6 host my-ipv6-host 2001::8f9

Related Commands

show hosts

Notes




ip/ipv6 map-hostname


{ip |ipv6} map-hostname
no {ip | ipv6} map-hostname

Maps between the currently-configured hostname and the loopback address 127.0.0.1.
The no form of the command clears the mapping.

Syntax Description

N/A

Default

IPv4 mapping is enabled by default
IPv6 mapping is disabled by default

Configuration Mode

config

History

3.1.0000

Example

switch (config)# ip map-hostname

Related Commands

show hosts

Notes

  • If no mapping is configured, a mapping between the hostname and the IPv4 loopback address 127.0.0.1 will be added
  • The no form of the command maps the hostname to the IPv6 loopback address if there is no statically configured mapping from the hostname to an IPv6 address (disabled by default)
  • Static host mappings are preferred over DNS results. As a result, with this option set, you will not be able to look up your hostname on your configured DNS server; but without it set, some problems may arise if your hostname cannot be looked up in DNS.



show hosts


show hosts

Displays hostname, DNS configuration, and static host mappings.

Syntax Description

N/A

Default

N/A

Configuration Mode

Any command mode

History

3.1.0000


3.8.1000Updated example

Example

switch (config)# show hosts

Hostname: switch1

Name servers:
10.7.77.192 dynamic (DHCP on mgmt0)
10.7.77.135 dynamic (DHCP on mgmt0)
10.198.0.169 dynamic (DHCP on mgmt0)
(*) 10.211.0.124 dynamic (DHCP on mgmt0)

Domain names:
mtl.labs.mlnx dynamic (DHCP on mgmt0)

(*) Inactive due to system limits on name servers and domain names.

Static IPv4 host mappings:
10.7.144.133 --> switch1
127.0.0.1 --> localhost

Static IPv6 host mappings:
::1 --> localhost6

Automatically map hostname to loopback address : yes
Automatically map hostname to IPv6 loopback address: no

Related Commands


Notes


Routing

{ip | ipv6} route


{ip | ipv6} route [vrf <vrf-name>] {<network-prefix> <netmask> | <network-prefix>/<masklen>} <next-hop>
no ip route [vrf <vrf-name>] {<network-prefix> <netmask> | <network-prefix>/<masklen>} <next-hop>

Sets a static route for a given IP.
The no form of the command deletes the static route.

Syntax Description

network-prefix

IPv4 or IPv6 network prefix

netmask

IPv4 netmask formats are:

  • /24
  • 255.255.255.0

IPv6 netmask format is:

  • /48 (as a part of the network prefix)

nexthop-address

The IPv4 or IPv6 address of the next hop router for this route

ifname

The interface name (e.g. mgmt0, mgmt1)

Default

N/A

Configuration Mode

config

History

3.1.0000

Example

switch (config)# ip route 20.20.20.0 255.255.255.0 mgmt0

Related Commands

show ip route

Notes




ipv6 default-gateway


ipv6 default-gateway {<ip-address> | <ifname>}
no ipv6 default-gateway

Sets a static default gateway.
The no form of the command deletes the default gateway.

Syntax Description

ip address

The default gateway IP address (IPv6)

ifname

The interface name (e.g., mgmt0, mgmt1)

Default

N/A

Configuration Mode

config

History

3.1.0000


3.2.0500

removed IPv4 configuration option

Example

switch (config)# ipv6 default-gateway ::1

Related Commands

show ip/ipv6 route
show ipv6 default-gateway

Notes

  • The configured default gateway will not be used if DHCP is enabled
  • In order to configure ipv4 default-gateway use ‘ip route’ command.



show ip/ipv6 route


show {ip | ipv6} route [static]

Displays the routing table in the system.

Syntax Description

static

Filters the table with the static route entries

Default

N/A

Configuration Mode

Any command mode

History

3.1.0000

Example

switch (config)# show ip route

Destination      Mask                 Gateway         Interface       Source
default 0.0.0.0 172.30.0.1 mgmt0 DHCP
10.10.10.10 255.255.255.255 0.0.0.0 mgmt0 static
20.10.10.10 255.255.255.255 172.30.0.1 mgmt0 static
20.20.20.0 255.255.255.0 0.0.0.0 mgmt0 static
172.30.0.0 255.255.0.0 0.0.0.0 mgmt0 interface
switch (config)# show ipv6 route
Destination prefix
Gateway Interface Source
-----------------------------------------------------------------------
::/0
:: mgmt0 static
::1/128
:: lo local
2222:2222:2222::/64
:: mgmt1 interface

Related Commands

ip route

Notes




show ipv6 default-gateway


show ipv6 default-gateway [static]

Displays the default gateway.

Syntax Description

static

Displays the static configuration of the default gateway

Default

N/A

Configuration Mode

Any command mode

History

3.1.0000

Example

switch (config)# show ipv6 default-gateway
Active default gateways:
172.30.0.1 (interface: mgmt0)
switch (config)# show ipv6 default-gateway static
Configured default gateway: 10.10.10.10

Related Commands

ipv6 default-gateway

Notes

The configured IPv4 default gateway will not be used if DHCP is enable

Network to Media Resolution (ARP & NDP)

IPv4 network use Address Resolution Protocol (ARP) to resolve IP address to MAC address, while IPv6 network uses Network Discovery Protocol (NDP) that performs basically the same as ARP.

ip arp


ip arp <ip-address> <mac-address>
no ip arp <ip-address> <mac-address>

Sets a static ARP entry.
The no form of the command deletes the static ARP.

Syntax Description

ip-address

IPv4 address

mac-address

MAC address

Default

N/A

Configuration Mode

config interface management

History

3.2.0500

Example

switch (config interface mgmt0)#ip arp 20.20.20.20 aa:aa:aa:aa:aa:aa

Related Commands

show ip arp
ip route

Notes




ip arp timeout


ip arp [vrf <vrf-name>] time out <timeout-value>
no ip arp [vrf <vrf-name>] timeout

Sets the dynamic ARP cache timeout.
The no form of the command sets the timeout to default.

Syntax Description


timeout-value

Time (in seconds) that an entry remains in the ARP cache
Range: 60-28800

vrf-name

VRF session name

Default

1500 seconds

Configuration Mode

config

History


3.2.0230


3.5.1000

Added VRF parameter and updated Notes

Example

switch (config)# ip arp timeout 2000

Related Commands

ip arp
show ip arp

Notes

  • This value is used as the default ARP timeout whenever a new IP interface is created
  • The time interval after which each ARP entry becomes stale may actually vary from 50-150% of the configured value



show ip arp


show ip arp [interface <type> | <ip-address> | count]

Displays ARP table.

Syntax Description

interface type

Filters the table according to a specific interface (i.e. mgmt0)

ip-address

Filters the table to the specific ip-address

count

Shows ARP statistics

Default

N/A

Configuration Mode

Any command mode

History

3.3.3000

Example
switch (config)# show ip arp

Total number of entries: 3

Address Type Hardware Address Interface
---------------------------------------------------------------------
10.209.0.1 Dynamic ETH 00:00:5E:00:01:01 mgmt0
10.209.1.120 Dynamic ETH 00:02:C9:62:E8:C2 mgmt0
10.209.1.121 Dynamic ETH 00:02:C9:62:E7:42 mgmt0
switch (config)# show ip arp count
ARP Table size: 3 (inband: 0, out of band: 3)

Related Commands


Notes




ipv6 neighbor


ipv6 neighbor <ipv6-address> <ifname> <mac-address>
no ipv6 neighbor <ipv6-address> <ifname> <mac-address>

Adds a static neighbor entry.
The no form of the command deletes the static entry.

Syntax Description

ipv6-address

The IPv6 address

ifname

The management interface (i.e. mgmt0, mgmt1)

mac-address

The MAC address

Default

N/A

Configuration Mode

config

History

3.1.0000

Example

switch (config)# ipv6 neighbor 2001:db8:701f::8f9 mgmt0 00:11:22:33:44:55

Related Commands

show ipv6 neighbor
ipv6 route
arp
clear ipv6 neighbors

Notes

  • ARP is used only with IPv4. In IPv6 networks, Neighbor Discovery Protocol (NDP) is used similarly.
  • Use The no form of the command to remove static entries. Dynamic entries can be cleared via the “clear ipv6 neighbors” command.



clear ipv6 neighbors


clear ipv6 neighbors{ethernet <port> | vlan <vlan-id> | port-channel <id> | vrf <vrf-id>} [<ip-addr>]


Clears the dynamic neighbors cache.

Syntax Description

N/A

Default

N/A

Configuration Mode

config

History

3.1.0000


3.6.4110

Updated command

Example

switch (config)# clear ipv6 neighbors

Related Commands

ipv6 neighbor
show ipv6 neighbor
arp

Notes

  • Clearing Neighbor Discovery Protocol (NDP) cache removes only the dynamic entries learned and not the static entries configured
  • Use the no form of the command to remove static entries



show ipv6 neighbors


show ipv6 neighbors [static]

Displays the Neighbor Discovery Protocol (NDP) table.

Syntax Description

static

Filters only the table of the static entries.

Default

N/A

Configuration Mode

Any command mode

History

3.1.0000

Example

switch (config)# show ipv6 neighbors

IPv6 Address                          Age   MAC Address       State      Interf
------------------------------------- ----- ----------------- ---------- ------
2001::2 9428 AA:AA:AA:AA:AA:AA permanent mgmt0

Related Commands

ipv6 neighbor
clear ipv6 neighbor
show ipv6

Notes


DHCP

ip dhcp


ip dhcp {default-gateway yield-to-static | hostname <hostname>| primary-intf <ifname> | send-hostname}
no ip dhcp {default-gateway yield-to-static| hostname | | primary-intf | send-hostname}

Sets global DHCP configuration.
The no form of the command deletes the DHCP configuration.

Syntax Description

yield-to-static|

Does not allow you to install a default gateway from DHCP if there is already a statically configured one

hostname

Specifies the hostname to be sent during DHCP client negotiation if send-hostname is enabled

primary-intf <ifname>

Sets the interface from which a non-interface-specific configuration (resolver and routes) will be accepted via DHCP

send-hostname

Enables the DHCP client to send a hostname during negotiation

Default

no ip dhcp yield-to-static
no ip dhcp hostname
ip ip dhcp primary-intf mgmt0
no ip dhcp send-hostname

Configuration Mode

config

History

3.1.0000

Example

switch (config)# ip dhcp default-gateway yield-to-static

Related Commands

show ip dhcp
dhcp [renew]

Notes

DHCP is supported for IPv4 networks only



show ip dhcp


show ip dhcp

Displays the DHCP configuration and status.

Syntax Description

N/A

Default

N/A

Configuration Mode

Any command mode

History

3.1.0000



3.6.5000

Updated Example

Example

switch (config)# show ip dhcp
----------------------------------------
Interface DHCP DHCP Valid
Enabled Running lease
----------------------------------------
dummy0 no no no
lo no no no
mgmt0 yes yes yes
mgmt1 no no no
mgmts0 no no no
mgmts1 no no no
vif1 no no no

IPv4 dhcp default gateway yields to static configuration: no

DHCP primary interface:
Configured: mgmt0
Active: mgmt0

DHCP client options:
Send Hostname: no
Client Hostname: 1.1.1.1

Related Commands

ip dhcp
dhcp [renew]

Notes


General IPv6

ipv6 enable


ipv6 enable
no ipv6 enable

Enables IPv6 globally on the management interface.
The no form of the command disables IPv6 globally on the management interface.

Syntax Description

N/A

Default

IPv6 is disabled

Configuration Mode

config

History

3.1.0000

Example

switch (config)# ipv6 enable

Related Commands

ipv6 default-gateway
ipv6 host
ipv6 map-hostname
ipv6 neighbor
ipv6 route
show ipv6
show ipv6 default-gateway
show ipv6 route

Notes


IP Diagnostic Tools

ping


ping [-LRUbdfnqrvVaA] [-c count] [-i interval] [-w deadline] [-p pattern] [-s packetsize] [-t ttl] [-I interface or address] [-M mtu discovery hint] [-S sndbuf] [-T timestamp option ] [-Q tos ] [hop1 ...] destination

Sends ICMP echo requests to a specified host.

Syntax Description

Linux Ping options

https://www.lifewire.com/uses-of-command-ping-2201076

Default

N/A

Configuration Mode

config

History

3.1.0000

Example

switch (config)# ping 172.30.2.2
PING 172.30.2.2 (172.30.2.2) 56(84) bytes of data.
64 bytes from 172.30.2.2: icmp_seq=1 ttl=64 time=0.703 ms
64 bytes from 172.30.2.2: icmp_seq=2 ttl=64 time=0.187 ms
64 bytes from 172.30.2.2: icmp_seq=3 ttl=64 time=0.166 ms
64 bytes from 172.30.2.2: icmp_seq=4 ttl=64 time=0.161 ms
64 bytes from 172.30.2.2: icmp_seq=5 ttl=64 time=0.153 ms
64 bytes from 172.30.2.2: icmp_seq=6 ttl=64 time=0.144 ms
...
--- 172.30.2.2 ping statistics ---
6 packets transmitted, 6 received, 0% packet loss, time 5004ms
rtt min/avg/max/mdev = 0.144/0.252/0.703/0.202 ms

Related Commands

traceroutes

Notes





traceroute


traceroute [-46dFITUnrAV] [-f first_ttl] [-g gate,...] [-i device] [-m max_ttl] [-N squeries] [-p port] [-t tos] [-l flow_label] [-w waittime] [-q nqueries] [-s src_addr] [-z sendwait] host [packetlen]

Traces the route packets take to a destination.

Syntax Description

-4

Uses IPv4

-6Uses IPv6
-dEnables socket level debugging
-FSets DF (do not fragment bit) on
-IUses ICMP ECHO for tracerouting
-TUses TCP SYN for tracerouting
-UUses UDP datagram (default) for tracerouting
-nDoes not resolve IP addresses to their domain names
-rBypasses the normal routing and send directly to a host on an attached network
-APerforms AS path lookups in routing registries and print results directly after the corresponding addresses
-VPrints version info and exit
-fStarts from the first_ttl hop (instead from 1)
-gRoutes packets through the specified gateway (maximum 8 for IPv4 and 127 for IPv6)
-iSpecifies a network interface with which to operate
-mSets the max number of hops (max TTL to be reached). Default is 30.
-NSets the number of probes to be tried simultaneously (default is 16)
-pUses destination port. It is an initial value for the UDP destination port (incremented by each probe, default is 33434), for the ICMP seq number (incremented as well, default from 1), and the constant destination port for TCP tries (default is 80).
-tSets the TOS (IPv4 type of service) or TC (IPv6 traffic class) value for outgoing packets
-lUses specified flow_label for IPv6 packets
-wSets the number of seconds to wait for response to a probe (default is 5.0). Non-integer (float point) values allowed too.
-sUses source src_addr for outgoing packets.
-qSets the number of probes per each hop. Default is 3.
-zSets minimal time interval between probes (default is 0). If the value is more than 10, then it specifies a number in milliseconds, else it is a number of seconds (float point values allowed too).

Default

N/A

Configuration Mode

config

History

3.1.0000

Example

switch (config)# traceroute 192.168.10.70

traceroute to 192.168.10.70 (192.168.10.70), 30 hops max, 40 byte packets
1 172.30.0.1 (172.30.0.1) 3.632 ms 2.849 ms 3.544 ms
2 10.222.128.46 (10.222.128.46) 3.176 ms 3.289 ms 3.656 ms
3 10.158.128.30 (10.158.128.30) 15.331 ms 15.819 ms 16.388 ms
4 10.158.128.65 (10.158.128.65) 20.468 ms 7.893 ms 12.27 ms
5 10.7.34.115 (10.7.34.115) 16.405 ms 11.985 ms 12.264 ms6 192.168.10.70 (192.168.10.70) 16.377 ms 16.091 ms 20.475 ms

Related Commands

ping

Notes







tcpdump


tcpdump [-aAdDeflLnNOpqRStuUvxX] [-c count] [-C file_size] [-E algo:secret] [-F file] [-i interface] [-M secret] [-r file] [-s snaplen] [-T type] [-w file] [-W filecount] [-y datalinktype] [-Z user] [-D list possible interfaces] [expression]

Invokes standard binary, passing command line parameters straight through. Runs in foreground, printing packets as they arrive, until the user hits Ctrl+C.

Syntax DescriptionN/A

Default

N/A

Configuration Mode

config

History

3.1.0000

Example

switch (config)# tcpdump
......
09:37:38.678812 IP 192.168.10.7.ssh > 192.168.10.1.54155: P 1494624:1494800(176) ack 625 win 90
<nop,nop,timestamp 5842763 858672398>
09:37:38.678860 IP 192.168.10.7.ssh > 192.168.10.1.54155: P 1494800:1495104(304) ack 625 win 90
<nop,nop,timestamp 5842763 858672398>
...
9141 packets captured
9142 packets received by filter
0 packets dropped by kernel

Related Commands


Notes