497
identified as the large AS. Use this command to add/delete confederation members
Example:
Switch(config-router)# bgp confederation identifier 600
Switch(config-router)#bgp confederation peers 100 200
13.8.3.15 bgp dampening
Command: bgp dampening [<1-45>] [<1-20000> <1-20000> <1-255>] [<1-45>]
no bgp dampening [<1-45>] [<1-20000> <1-20000> <1-255>] [<1-45>]
Function:
Configure the route dampening. The “
no bgp dampening [<1-45>]
[<1-20000> <1-20000> <1-255>] [<1-45>]
” command cancels the route dampening
function
Parameter: <1-45>
: Respectively the penalty half-lives of accessible and inaccessible
route, namely the penalty value is reduced to half of the previous value, in minutes.
<1-20000>
: Respectively the penalty reuse border and restrain border
<1-255>
: Maximum restrain route time, in minutes
Default:
Half-life of accessible route is 15 minutes, 5 minutes for inaccessible. The
restrain border is 2000, reuse border is 750, and maximum restrain time is 60 minutes
Command Mode:
BGP route mode.
Usage Guide:
Abundant route update due to unstable route could be reduced with
route dampening technology, of which the algorithm is lay penalty on the route when the
route fluctuates, and when penalty exceeds the restrain border this route will no longer
be advertised. The penalty value will be reduced by time by the half-life index regulation if
the route keeps stable and finally be advertised again when the penalty falls below the
border or the restrain time exceeds the maximum restrain time. This command is for
enabling/disabling the route dampening and configuring its parameters
Example:
Switch(config-router)# bgp dampening
13.8.3.16 bgp default
Command:bgp default {ipv4-unicast|local-preference <0-4294967295>}
no bgp default {ipv4-unicast|local-preference [<0-4294967295>]}
Function:
Set the BGP defaults, the “
no bgp default {ipv4-unicast|local-preference
[<0-4294967295>]}
” command cancels this configuration
Parameter: <0-4294967295>
: Default local priority
Default:
The IPv4 unicast is default enabled when BGP is enabled. The default priority is
100.
Command Mode:
BGP route mode.
Usage Guide:
IPv4 unicast address-family is default enabled in BGP. Cancel this setting
