R3303-HP HSR6800 Routers Layer 3 - IP Routing Configuration Guide

219
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. ipv4-family vpn-instance
vpn-instance-name
Use either method.
3. Specify the maximum number
of routes that a router can
receive from a peer or peer
group.
peer { group-name | ip-address }
route-limit prefix-number
[ { alert-only | reconnect
reconnect-time } |
percentage-value ] *
By default, the number of routes
that a router can receive from a
peer or peer group is not limited.
Configuring BGP route dampening
By configuring BGP route dampening, you can suppress unstable routes from being added to the local
routing table or from being advertised to BGP peers. This feature applies to EBGP routes but not to IBGP
routes.
To configure BGP route dampening:
Ste
p
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. ipv4-family vpn-instance
vpn-instance-name
Use either method.
3. Configure BGP route
dampening.
dampening [ half-life-reachable
half-life-unreachable reuse suppress
ceiling | route-policy
route-policy-name ] *
Not configured by default.
Controlling BGP path selection
By configuring BGP path attributes, you can control BGP path selection.
Specifying a preferred value for routes received
This task allows you to modify the preferred value of a route 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 route to the destination.
To specify a preferred value for routes from a peer or peer group: