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Cumulus Linux

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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.

If you are using the current version of Cumulus Linux, the content on this page may not be up to date. The current version of the documentation is available here. If you are redirected to the main page of the user guide, then this page may have been renamed; please search for it there.

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.

Action
 NCLU Commands FRRouting Commands
Display the routing table cumulus@switch:~$ net show route switch# show ip route
Create a new neighbor cumulus@switch:~$ net add bgp autonomous-system 65002
cumulus@switch:~$ net add bgp neighbor 14.0.0.22		 switch(config)# router bgp 65002
switch(config-router)# neighbor 14.0.0.22
Redistribute routing information from static route entries into RIP tables cumulus@switch:~$ net add bgp redistribute static switch(config)# router bgp 65002
switch(config-router)# redistribute static
Define a static route cumulus@switch:~$ net add routing route 155.1.2.20/24 bridge 45 switch(config)# ip route 155.1.2.20/24 bridge 45
Configure an IPv6 address cumulus@switch:~$ net add interface swp3 ipv6 address 3002:2123:1234:1abc::21/64 switch(config)# int swp3
switch(config-if)# ipv6 address 3002:2123:1234:1abc::21/64
Enable topology checking (PTM) cumulus@switch:~$ net add routing ptm-enable switch(config)# ptm-enable
Configure MTU in IPv6 network discovery for an interface cumulus@switch:~$ sudo cl-ra interface swp3 set mtu 9000 switch(config)# int swp3
switch(config-if)# ipv6 nd mtu 9000
Set the OSPF interface priority cumulus@switch:~$ net add interface swp3 ospf6 priority 120 switch(config)# int swp3
switch(config-if)# ip ospf6 priority 120
Configure timing for OSPF SPF calculations cumulus@switch:~$ net add ospf6 timers throttle spf 40 50 60 switch(config)# router ospf6
switch(config-ospf6)# timer throttle spf 40 50 60
Configure the OSPF Hello packet interval in number of seconds for an interface cumulus@switch:~$ net add interface swp4 ospf6 hello-interval 60 switch(config)# int swp4
switch(config-if)# ipv6 ospf6 hello-interval 60
Display BGP information cumulus@switch:~$ net show bgp summary switch# show ip bgp summary
Display OSPF debugging status cumulus@switch:~$ net show debugs switch# show debugging ospf
Show information about the interfaces on the switch cumulus@switch:~$ net show interface switch# 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

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