Peer Preferred-Value (Bgp/Bgp-Vpn Instance View) - 3Com S7906E Command Reference Manual

peer preferred-value (BGP/BGP-VPN instance view)

Syntax
peer { group-name | ip-address } preferred-value value
undo peer { group-name | ip-address } preferred-value
View
BGP view/BGP-VPN instance view
Default Level
2: System level
Parameters
group-name: Name of a peer group, a string of 1 to 47 characters.
ip-address: IP address of a peer.
value: Preferred value, in the range 0 to 65535.
Description
Use the peer preferred-value command to assign a preferred value to routes received from a peer or
peer group.
Use the undo peer preferred-value command 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 greatest preferred value is
selected as the route to the destination.
Note that:
If you both reference a routing policy and use the peer { group-name | ip-address } preferred-value
value 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 the command peer { group-name | ip-address } route-policy
route-policy-name { export | import } in this document, and the command apply preferred-value
preferred-value in Routing Policy Commands of the IP Routing Volume.
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
1-57