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Command: bgp confederation peers <as-id> [<as-id>..]
no bgp confederation peers <as-id> [<as-id>..]
Function:
Add/delete one or several AS to a confederation.
Parameter: <as-id>:
ID numbers of the AS included in the confederation, ranging from 1 to
4294967295, it can be shown in decimal notation (such as 6553700) or delimiter method (such
as 100.100), which could be multiple.
Default:
No members.
Command Mode:
BGP routing mode.
Usage Guide:
Confederation is for dividing large AS into several smaller AS, while still identified
as the large AS. Use this command to add/delete confederation members.
Example:
Create a confederation, ID is 600, add 100, 200, 100.300 members.
Switch(config-router)# bgp confederation identifier 600
Switch(config-router)#bgp confederation peers 100 200 100.300
1.8.3.14 bgp dampening
Command: bgp dampening [<1-45>] [<1-20000> <1-20000> <1-255>] [<1-45>]
no bgp dampening
Function:
Configure the route dampening.The “
no bgp dampening
” 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, 15 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
1.8.3.15 bgp default
Command: bgp default {ipv4-unicast|local-preference <0-4294967295>}
no bgp default {ipv4-unicast|local-preference [<0-4294967295>]}