Static Routing

The nv unset commands remove the configuration you set with the equivalent nv set commands. This guide only describes an nv unset command if it differs from the nv set command.

nv set vrf <vrf-id> router static <route-id>

Configures static routes in a VRF. You can use static routing if you do not require the complexity of a dynamic routing protocol (such as BGP or OSPF), if you have routes that do not change frequently and for which the destination is only one or two paths away.

With static routing, you configure the switch manually to send traffic with a specific destination prefix to a specific next hop. When the switch receives a packet, it looks up the destination IP address in the routing table and forwards the packet accordingly.

Cumulus Linux adds static routes to the FRR routing table and then to the kernel routing table.


nv set vrf <vrf-id> router static <route-id> distance <distance-id>

Configures static route settings with the destination path distance.


nv set vrf <vrf-id> router static <route-id> distance <distance-id> via <via-id>

Configures the destination path distance and next hop for a specific static route in the specified VRF.

Command Syntax

SyntaxDescription
<vrf-id>The VRF you want to configure.
<route-id>The IPv4 or IPv6 prefix.
<distance-id>A path distance.
<via-id>The IP address of the next hop router.

Version History

Introduced in Cumulus Linux 5.0.0

Example

cumulus@switch:~$ nv set vrf default router static 10.10.10.101/32 distance 2 via 10.0.1.0

nv set vrf <vrf-id> router static <route-id> distance <distance-id> via <via-id> flag onlink

Configures the destination path distance and next hop for a specific static route in the specified VRF, and adds the onlink flag, which configures the switch to pretend that the next hop is directly attached to the link, even if it does not match any interface prefix.

Command Syntax

SyntaxDescription
<vrf-id>The VRF you want to configure.
<route-id>The IPv4 or IPv6 prefix.
<distance-id>The path distance.
<via-id>The IP address of the next hop router.

Version History

Introduced in Cumulus Linux 5.0.0

Example

cumulus@switch:~$ nv set vrf default router static 10.10.10.101/32 distance 2 via 10.0.1.0 flag onlink 

nv set vrf <vrf-id> router static <route-id> distance <distance-id> via <via-id> interface <interface-id>

Configures the destination path distance and next hop for a specific static route in the specified VRF and the interface to use for egress. If you do not specify an interface, Cumulus Linux determines the interface automatically. This command is only valid when the next hop (via) type is an IPv4 or IPv6 address.

Command Syntax

SyntaxDescription
<vrf-id>The VRF you want to configure.
<route-id>The IPv4 or IPv6 prefix.
<distance-id>The path distance.
<via-id>The IP address of the next hop router.
<interface-id>The interface to use for egress.

Version History

Introduced in Cumulus Linux 5.0.0

Example

cumulus@switch:~$ nv set vrf default router static 10.10.10.101/32 distance 2 via 10.0.1.0 interface swp1

nv set vrf <vrf-id> router static <route-id> distance <distance-id> tag

Configures the destination path distance and tag for a specific static route in the specified VRF. The tag provides additional information about the static route, such as the community tag or a route metric, and is included with the route in the routing table. The tag can be a value between 1 and 4294967295, or none.

Command Syntax

SyntaxDescription
<vrf-id>The VRF you want to configure.
<route-id>The IPv4 or IPv6 prefix.
<distance-id>The path distance.

Version History

Introduced in Cumulus Linux 5.0.0

Example

cumulus@switch:~$ nv set vrf default router static 10.10.10.101/32 distance 2 tag none

nv set vrf <vrf-id> router static <route-id> distance <distance-id> via <via-id> type

Configures the destination path distance and next hop type for a specific static route in the specified VRF. The next hop type can be interface, ipv4-address, ipv6-address, blackhole, or reject.

Command Syntax

SyntaxDescription
<vrf-id>The VRF you want to configure.
<route-id>The IPv4 or IPv6 prefix.
<distance-id>The path distance.
<via-id>The IP address of the next hop router.

Version History

Introduced in Cumulus Linux 5.0.0

Example

cumulus@switch:~$ nv set vrf default router static 10.10.10.101/32 distance 2 via 10.10.10.1 type interface

nv set vrf <vrf-id> router static <route-id> distance <distance-id> via <via-id> vrf

Configures the destination path distance and next hop for a specific static route in the specified VRF, and the VRF to use for egress.

Command Syntax

SyntaxDescription
<vrf-id>The VRF you want to configure.
<route-id>The IPv4 or IPv6 prefix.
<distance-id>The path distance.
<via-id>The IP address of the next hop router.
<vrf-id>The VRF name.

Version History

Introduced in Cumulus Linux 5.0.0

Example

cumulus@switch:~$ nv set vrf default router static 10.10.10.101/32 distance 2 via 10.10.10.1 vrf RED

nv set vrf <vrf-id> router static <route-id> tag

Configures the static route tag in the specified VRF. The tag provides additional information about the static route, such as the community tag or a route metric, and is included with the route in the routing table. The tag can be a value between 1 and 4294967295, or none.

Command Syntax

SyntaxDescription
<vrf-id>The VRF you want to configure.
<route-id>The IPv4 or IPv6 prefix.

Version History

Introduced in Cumulus Linux 5.0.0

Example

cumulus@switch:~$ nv set vrf default router static 10.10.10.101/32 tag none

nv set vrf <vrf-id> router static <route-id> via <via-id>

Configures the next hop for a specific static route in the specified VRF.

Command Syntax

SyntaxDescription
<vrf-id>The VRF you want to configure.
<route-id>The IPv4 or IPv6 prefix.
<via-id>The IP address of the next hop router.

Version History

Introduced in Cumulus Linux 5.0.0

Example

cumulus@switch:~$ nv set vrf default router static 10.10.10.101/32 via 10.10.10.1

nv set vrf <vrf-id> router static <route-id> via <via-id> flag onlink

Configures the next hop for a specific static route in the specified VRF, and adds the onlink flag, which configures the switch to pretend that the next hop is directly attached to the link, even if it does not match any interface prefix.

Command Syntax

SyntaxDescription
<vrf-id>The VRF you want to configure.
<route-id>The IPv4 or IPv6 prefix.
<via-id>The IP address of the next hop router.

Version History

Introduced in Cumulus Linux 5.0.0

Example

cumulus@switch:~$ nv set vrf default router static 10.10.10.101/32 via 10.10.10.1 flag onlink 

nv set vrf <vrf-id> router static <route-id> via <via-id> interface <interface-name>

Configures the next hop for a specific static route in the specified VRF, and the interface to use for egress. If you do not specify an interface, Cumulus Linux determines the interface automatically. This command is only valid when the next hop (via) type is an IPv4 or IPv6 address.

Command Syntax

SyntaxDescription
<vrf-id>The VRF you want to configure.
<route-id>The IPv4 or IPv6 prefix.
<via-id>The IPv4 or IPv6 address of the next hop router.
<interface-name>The interface to use for egress.

Version History

Introduced in Cumulus Linux 5.0.0

Example

cumulus@switch:~$ nv set vrf default router static 10.10.10.101/32 via 10.10.10.1 interface swp1

nv set vrf <vrf-id> router static <route-id> via <via-id> type

Configures the next hop type for a specific static route in the specified VRF. The next hop type can be interface, ipv4-address, ipv6-address, blackhole, or reject.

Command Syntax

SyntaxDescription
<vrf-id>The VRF you want to configure.
<route-id>The IPv4 or IPv6 prefix.
<via-id>The IP address of the next hop router.

Version History

Introduced in Cumulus Linux 5.0.0

Example

cumulus@switch:~$ nv set vrf default router static 10.10.10.101/32 via 10.10.10.1 type interface

nv set vrf <vrf-id> router static <route-id> via <via-id> vrf <vrf-id>

Configures the next hop for a specific static route in the specified VRF, and the VRF to use for egress. If you do not specify a VRF, Cumulus Linux uses the default VRF.

Command Syntax

SyntaxDescription
<vrf-id>The VRF you want to configure.
<route-id>The IPv4 or IPv6 prefix.
<via-id>The IP address of the next hop router.
<vrf-id>The egress VRF.

Version History

Introduced in Cumulus Linux 5.0.0

Example

cumulus@switch:~$ nv set vrf default router static 10.10.10.101/32 via 10.10.10.1 vrf RED