Static

Static routes are manually configured routes, which, in general, cannot be updated dynamically from information VyOS learns about the network topology from other routing protocols. However, if a link fails, the router will remove routes, including static routes, from the RIPB that used this interface to reach the next hop. In general, static routes should only be used for very simple network topologies, or to override the behavior of a dynamic routing protocol for a small number of routes. The collection of all routes the router has learned from its configuration or from its dynamic routing protocols is stored in the RIB. Unicast routes are directly used to determine the forwarding table used for unicast packet forwarding.

Static Routes

set protocols static route <subnet> next-hop <address>

Configure next-hop <address> for an IPv4 static route. Multiple static routes can be created.

set protocols static route <subnet> next-hop <address> disable

Disable this IPv4 static route entry.

set protocols static route <subnet> next-hop <address> distance <distance>

Defines next-hop distance for this route, routes with smaller administrative distance are elected prior to those with a higher distance.

Range is 1 to 255, default is 1.

Note

Routes with a distance of 255 are effectively disabled and not installed into the kernel.

set protocols static route6 <subnet> next-hop <address>

Configure next-hop <address> for an IPv6 static route. Multiple static routes can be created.

set protocols static route6 <subnet> next-hop <address> disable

Disable this IPv6 static route entry.

set protocols static route6 <subnet> next-hop <address> distance <distance>

Defines next-hop distance for this route, routes with smaller administrative distance are elected prior to those with a higher distance.

Range is 1 to 255, default is 1.

Note

Routes with a distance of 255 are effectively disabled and not installed into the kernel.

Interface Routes

set protocols static route <subnet> interface <interface>

Allows you to configure the next-hop interface for an interface-based IPv4 static route. <interface> will be the next-hop interface where traffic is routed for the given <subnet>.

set protocols static route <subnet> interface <interface> disable

Disables interface-based IPv4 static route.

set protocols static route <subnet> interface <interface> distance <distance>

Defines next-hop distance for this route, routes with smaller administrative distance are elected prior to those with a higher distance.

Range is 1 to 255, default is 1.

set protocols static route6 <subnet> interface <interface>

Allows you to configure the next-hop interface for an interface-based IPv6 static route. <interface> will be the next-hop interface where traffic is routed for the given <subnet>.

set protocols static route6 <subnet> interface <interface> disable

Disables interface-based IPv6 static route.

set protocols static route6 <subnet> interface <interface> distance <distance>

Defines next-hop distance for this route, routes with smaller administrative distance are elected prior to those with a higher distance.

Range is 1 to 255, default is 1.

Blackhole

set protocols static route <subnet> blackhole

Use this command to configure a “black-hole” route on the router. A black-hole route is a route for which the system silently discard packets that are matched. This prevents networks leaking out public interfaces, but it does not prevent them from being used as a more specific route inside your network.

set protocols static route <subnet> blackhole distance <distance>

Defines blackhole distance for this route, routes with smaller administrative distance are elected prior to those with a higher distance.

set protocols static route6 <subnet> blackhole

Use this command to configure a “black-hole” route on the router. A black-hole route is a route for which the system silently discard packets that are matched. This prevents networks leaking out public interfaces, but it does not prevent them from being used as a more specific route inside your network.

set protocols static route6 <subnet> blackhole distance <distance>

Defines blackhole distance for this route, routes with smaller administrative distance are elected prior to those with a higher distance.

Alternate Routing Tables

TBD

Alternate routing tables are used with policy based routing by utilizing VRF.

ARP

ARP is a communication protocol used for discovering the link layer address, such as a MAC address, associated with a given internet layer address, typically an IPv4 address. This mapping is a critical function in the Internet protocol suite. ARP was defined in 1982 by RFC 826 which is Internet Standard STD 37.

In Internet Protocol Version 6 (IPv6) networks, the functionality of ARP is provided by the Neighbor Discovery Protocol (NDP).

To manipulate or display ARP table entries, the following commands are implemented.

Configure

set protocols static arp <address> hwaddr <mac>

This will configure a static ARP entry always resolving <address> to <mac>.

Example:

set protocols static arp 192.0.2.100 hwaddr 00:53:27:de:23:aa

Operation

show protocols static arp

Display all known ARP table entries spanning across all interfaces

vyos@vyos:~$ show protocols static arp
Address                  HWtype  HWaddress           Flags Mask     Iface
10.1.1.1                 ether   00:53:00:de:23:2e   C              eth1
10.1.1.100               ether   00:53:00:de:23:aa   CM             eth1

show protocols static arp interface eth1

Display all known ARP table entries on a given interface only (eth1):

vyos@vyos:~$ show protocols static arp interface eth1
Address                  HWtype  HWaddress           Flags Mask     Iface
10.1.1.1                 ether   00:53:00:de:23:2e   C              eth1
10.1.1.100               ether   00:53:00:de:23:aa   CM             eth1