3Com MSR 30, MSR 50 manual Peer public-as-only BGP/BGP-VPN instance view

1000 CHAPTER 72: BGP CONFIGURATION COMMANDS

Description Use the peer preferred-valuecommand to assign a preferred value to routes received from a peer or peer group.

Use the undo peer preferred-valuecommand to restore the default value.

The default preferred value is 0.

Routes learned from a peer have an initial preferred value.

Among multiple routes that have the same destination/mask and are learned from different peers, the one with the biggest preferred value is selected as the route to the network.

Note that:

If you both reference a routing policy and use the peer { group-name ip-address} preferred-valuevalue command to set a preferred value for routes from a peer, the routing policy sets a specified non-zero preferred value for routes matching it. Other routes not matching the routing policy uses the value set with the command. If the preferred value specified in the routing policy is zero, the routes matching it will also use the value set with the command. For information about using a routing policy to set a preferred value, refer to “peer group (BGP/BGP-VPN instance view)” on page 994, “peer route-policy(BGP/BGP-VPN instance view)” on page 1002 { export import } in this document, and “apply preferred-value” on page 1194

Examples # In BGP view, configure the preferred value as 50 for routes from peer 131.108.1.1.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] peer 131.108.1.1 preferred-value 50

#In BGP-VPN instance view, configure the preferred value as 50 for routes from peer 131.108.1.1 (the VPN has been created).

<Sysname> system-view [Sysname] bgp 100

[Sysname-bgp] ipv4-family vpn-instance vpn1 [Sysname-bgp-vpn1] peer 131.108.1.1 preferred-value 50

peer public-as-only (BGP/BGP-VPN instance view)

Syntax peer { group-name ip-address } public-as-only

undo peer { group-name ip-address} public-as-only

View BGP view/BGP-VPN instance view

Parameters group-name: Name of a peer group, a string of 1 to 47 characters. ip-address: IP address of a peer.