Configuring Bgp Route Dampening - Huawei Quidway NetEngine80E Configuration Manual

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
Received: Total 2 messages
Sent: Total 2 messages
Authentication type configured: None
Last keepalive received: 2012-03-06 19:17:37 UTC-8:00
Last keepalive sent
Last update
Last update
Minimum route advertisement interval is 40 seconds
Optional capabilities:
Route refresh capability has been enabled
4-byte-as capability has been enabled
Peer Preferred Value: 0
Routing policy configured:
No routing policy is configured
Tracking has been enabled, and the delay is 50s

8.15 Configuring BGP Route Dampening

BGP route dampening can be configured to suppress unstable routes.
Applicable Environment
The main cause of route instability is route flapping. A route is considered to be flapping when
it repeatedly appears and then disappears in the routing table. BGP is generally applied to
complex networks where routes change frequently. Frequent route flapping consumes lots of
bandwidth and CPU resources and even seriously affects network operations.
BGP route dampening prevents frequent route flapping by using a penalty value to measure route
stability. When a route flaps for the first time, a penalty value is assigned to the route. Later,
each time the route flaps, the penalty value of the route increases by a specific value. The greater
the penalty value, the less stable the route. If the penalty value of a route exceeds the pre-defined
threshold, the route will not be advertised until the penalty value of the route reduces to the reuse
threshold.
Issue 02 (2014-09-30)
Received active routes total: 0
Advertised total routes: 0
Port: Local - 49290
Configured: Connect-retry Time: 32 sec
Configured: Min Hold Time: 15 sec
Configured: Active Hold Time: 100 sec
Received : Active Hold Time: 180 sec
Negotiated: Active Hold Time: 180 sec
Peer optional capabilities:
Peer supports bgp multi-protocol extension
Peer supports bgp route refresh capability
Peer supports bgp 4-byte-as capability
Address family IPv4 Unicast: advertised and received
Update messages
Open messages
KeepAlive messages
Notification messages
Refresh messages
Update messages
Open messages
KeepAlive messages
Notification messages
Refresh messages
received: 2012-03-06 19:17:43 UTC-8:00
sent
NOTE
"Tracking has been enabled, and the delay is 50s" is displayed only when the display bgp peer verbose
command is run on the router enabled with BGP tracking.
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Remote - 179
: 2012-03-06 19:17:37 UTC-8:00
: 2012-03-06 19:17:37 UTC-8:00
8 BGP Configuration
Keepalive Time:30 sec
Keepalive Time:60 sec
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