R21xx-HP FlexFabric 11900 Layer 3 IP Routing Command Reference

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Syntax
In BGP IPv4 unicast address family view/BGP-VPN IPv4 unicast address family view/BGP VPNv4
address family view/BGP VPNv6 address family view:
peer { group-name | ip-address } preferred-value value
undo peer { group-name | ip-address } preferred-value
In BGP IPv6 unicast address family view:
peer { group-name | ipv6-address } preferred-value value
undo peer { group-name | ipv6-address } preferred-value
In BGP-VPN IPv6 unicast address family view:
peer { group-name | ipv6-address } preferred-value value
undo peer { group-name | ipv6-address } preferred-value
Default
The preferred value is 0.
Views
BGP IPv4 unicast address family view, BGP-VPN IPv4 unicast address family view, BGP VPNv4 address
family view, BGP IPv6 unicast address family view, BGP-VPN IPv6 unicast address family view, BGP
VPNv6 address family view
Predefined user roles
network-admin
Parameters
group-name: Specifies a peer group by its name, a case-sensitive string of 1 to 47 characters. The peer
group must have been created.
ip-address: Specifies a peer by its IP address. The peer must have been created.
ipv6-address: Specifies a peer by its IPv6 address. The peer must have been created.
value: Specifies the preferred value in the range of 0 to 65535.
Usage guidelines
If multiple routes that have the same destination are learned from different peers, you can specify
different preferred values for the routes as needed to control BGP path selection. The one with the
greatest preferred value is selected as the optimal route to the destination.
The preferred value is used for route selection on the local router and is not advertised to the peer. It has
only local significance.
You can also use the apply preferred-value command in a routing policy to configure the preferred value
for BGP routes. If both the peer preferred-value and apply preferred-value commands are configured,
the apply preferred-value command applies. If the preferred value set by the apply preferred-value
command is 0 or no routing policy is configured, the peer preferred-value command applies.
Examples
# In BGP IPv4 unicast address family view, specify the preferred value as 50 for routes from peer 1.1.1.1.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family unicast