R3303-HP 6600/HSR6600 Routers Layer 3 - IP Routing Configuration Guide

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If the number of routes received from a peer or peer group exceeds the upper limit, the router takes one
of the following actions based on your configuration:
• Tear down the BGP session to the peer or peer group.
• Display an alarm message.
• Tear down the BGP session to the peer or peer group and, after a specified period of time,
reestablishes a BGP session to the peer or peer group.
You can specify the threshold value for the router to display an alarm message. When the ratio of the
number of received routes to the maximum number reaches the percentage value, the router displays an
alarm message.
To configure the maximum number of prefixes allowed to be received from a peer or peer group:
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.