Controlling bgp path selection, Specifying a preferred value for routes received – H3C Technologies H3C S5560 Series Switches User Manual
Page 243
227
Step Command
Remarks
3.
Enter BGP IPv6 unicast
address family view or
BGP-VPN IPv6 unicast
address family view.
address-family ipv6 [ unicast ]
N/A
4.
Configure IPv6 BGP route
dampening.
dampening [ half-life-reachable
half-life-unreachable reuse suppress
ceiling | route-policy
route-policy-name ] *
By default, IPv6 BGP route
dampening is not configured.
Controlling BGP path selection
By configuring BGP path attributes, you can control BGP path selection.
Specifying a preferred value for routes received
Perform this task to set a preferred value for specific routes to control BGP path selection.
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 optimal route.
To specify a preferred value for routes from a peer or peer group (IPv4):
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter BGP view or BGP-VPN
instance view.
•
Enter BGP view:
bgp as-number
•
Enter BGP-VPN instance view:
a.
bgp as-number
b.
ip vpn-instance
vpn-instance-name
N/A
3.
Enter BGP IPv4 unicast
address family view or
BGP-VPN IPv4 unicast
address family view.
address-family ipv4 [ unicast ]
N/A
4.
Specify a preferred value for
routes received from a peer or
peer group.
peer { group-name | ip-address
[ mask-length ] } preferred-value
value
The default preferred value is 0.
To specify a preferred value for routes from a peer or peer group (IPv6):
Step Command
Remarks
1.
Enter system view.
system-view
N/A