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
Configure next-hop <address> for an IPv4 static route. Multiple static routes can be created.
Disable this IPv4 static route entry.
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.
Configure next-hop <address> for an IPv6 static route. Multiple static routes can be created.
Disable this IPv6 static route entry.
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
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>.
Disables interface-based IPv4 static route.
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.
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>.
Disables interface-based IPv6 static route.
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.
Defines blackhole distance for this route, routes with smaller administrative distance are elected prior to those with a higher distance.
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.
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
Operation
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
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