CANOGA PERKINS CanogaOS Command Reference - Manual (Page 286)

CanogaOS Command Line Reference Revision 1.02
Proprietary & Confidential Canoga Pertkins Metro Ethernet Switches Page 286 of 855
Command Syntax
(no) bgp dampening REACHTIME
(no) bgp dampening REACHTIME REUSE
(no) bgp dampening REACHTIME REUSE SUPPRESS MAXSUPPRESS (UNREACHTIME)
(no) bgp dampening ROUTEMAP
REACHTIME <1-45> Specifies the reachability half-life time in minutes. The time for the penalty to
decrease to one-half of its current value. The default is 15 minutes.
REUSE <1-20000> Specifies the reuse limit value. When the penalty for a suppressed route decays
below the reuse value, the routes become unsuppressed. The default reuse limit is 750 SUPPRESS
<1-20000> Specifies the suppress limit value. When the penalty for a route exceeds the suppress value,
the route is suppressed. The default suppress limit is 2000.
MAXSUPPRESS <1-255> Specifies the max-suppress-time. Maximum time that a dampened route is
suppressed. The default max-suppress value is 4 times the half-life time (60 minutes).
UNREACHTIME <1-45> Specifies the un-reachability half-life time for penalty, in minutes.
ROUTEMAP = route-map WORD Route-map to specify criteria for dampening.
WORD Specify the name of the route-map.
Command Mode
Router mode
Usage
Route dampening minimizes the instability caused by route flapping. A penalty is added for every flap in a
flapping route. As soon as the total penalty reaches the suppress limit the advertisement of the route is
suppressed. This penalty is decayed according to the configured half time value. Once the penalty is lower
than the reuse limit, the route advertisement is un-suppressed.
The dampening information is purged from the router once the penalty becomes less than half of the reuse
limit.
Examples
Switch# configure terminal
Switch(config)# router bgp 11
Switch(config-router)# bgp dampening 20 800 2500 80 25
16.13 bgp default ipv4-unicast
Use this command to configure BGP defaults and activate ipv4-unicast for a peer by default. This affects the
BGP global configuration.
Use the no parameter with this command to disable this function
Command Syntax
(no) bgp default ipv4-unicast