Configuring the PrefVal Attribute
Context
The PrefVal attribute is a Huawei proprietary attribute and is valid only on the device where it is configured. When a BGP routing table contains multiple routes to the same destination, BGP prefers the route with the highest PrefVal.
Procedure
- Run system-view
The system view is displayed.
- Run bgp { as-number-plain | as-number-dot }
The BGP view is displayed.
- Enter the corresponding address family view based on network type to configure BGP devices on networks.
Run ipv4-family unicast
The BGP-IPv4 unicast address family view is displayed.
Run ipv4-family multicast
The BGP-IPv4 multicast address family view is displayed.
Run ipv4-family vpnv4 [ unicast ]
The BGP-VPNv4 address family view is displayed.
Run ipv4-family vpn-instance vpn-instance-name
The BGP-VPN instance IPv4 address family view is displayed.
Run ipv6-family [ unicast ]
The BGP-IPv6 unicast address family view is displayed.
Run ipv6-family vpnv6 [ unicast ]
The BGP-VPNv6 address family view is displayed.
Run ipv6-family vpn-instance vpn-instance-name
The BGP-VPN instance IPv6 address family view is displayed.
- Run peer { group-name | ipv4-address | ipv6-address } preferred-value value
The PrefVal attribute is configured for all the routes learned from a specified peer.
By default, the PrefVal of a route learned from a peer is 0.
- Run commit
The configuration is committed.