D-Link DGS-3630 Emulator 1 - Page 193
bgp confederation peers, MI and EI Mode Only, 17 bgp dampening
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DGS-3630 Layer 3 Stackable Managed Switch CLI Reference Guide 13-16 bgp confederation peers (MI and EI Mode Only) This command is used to add subautonomous systems to belong to a single confederation. Use the no form of this command to delete the specified autonomous system (AS) in the confederation. bgp confederation peers AS-NUMBER[,AS-NUMBER,...] no bgp confederation peers AS-NUMBER[,AS-NUMBER,...] Parameters AS-NUMBER[,ASNUMBER,...] Specifies one or multiple AS numbers for BGP peers separated by a comma. The specified AS is in the same confederation. The valid values are from 1 to 4294967295. Default By default, no confederation peer is configured. Command Mode Router Configuration Mode. Command Default Level Level: 12. Usage Guideline In a large scale BGP network, confederation is a mechanism used to reduce the needs of fully mesh of iBGP sessions. With confederation, an autonomous system can be partitioned into a number of a sub-AS. To the routers outside, the group of sub-AS appear as a single AS identified by the confederation ID. Each sub-AS is fully meshed within the sub-AS and is connected to another sub-AS within the confederation. Route reflection can be used within the sub-AS to reduce the fully mesh. Although peers in different sub-AS are connected by eBGP sessions, they exchange routing information as if they were iBGP peers. The next-hop, MED, and local preference information is preserved within the confederation. Use the bgp confederation identifier command to specify the confederation ID and use the bgp confederation peer command to configure the neighbor session for connection to another sub-AS within the same confederation. Example This example shows how to configure the AS 21, 22, 23 as sub-ASs of a single confederation with confederation identifier 20. Switch# configure terminal Switch(config)# router bgp 20 Switch(config-router)# bgp confederation identifier 20 Switch(config-router)# bgp confederation peers 21,22,23 Switch(config-router)# 13-17 bgp dampening (MI and EI Mode Only) This command is used to enable the route dampening function. Use the no form of the command to disable the function. 188
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