Справочное Руководство для 3com S7906E

 

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peer { group-name | ip-address } preferred-value value  

undo peer { group-name | ip-address } preferred-value 

BGP view/BGP-VPN instance view 

2: System level 

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.  

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. 

# 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