在实际应用中大部分的BGP配置是比较复杂的,对等体组是简化配置的一种方法.

配置的基本步骤:
1 使用 neighbor peer-group-name peer-group 来创建BGP对等体组.
2 使用 neighbor peer-group-name 给对等体加上希望的参数.
3 使用 neighbor ip -address peer-group 将具有相同属性的BGP对等体放到一个组里.

对比例子:
正常配置:
router bgp 100
neighbor 192.168.1.1 remote-as 200
neighbor 192.168.1.1 password cisco
neighbor 192.168.1.2 remote-as 200
neighbor 192.168.1.2 next-hop-self
neighbor 192.168.1.2 password cisco
neighbor 192.168.1.3 remote-as 200
neighbor 192.168.1.3 password cisco
neighbor 192.168.1.3 next-hop-self
neighbor 192.168.2.2 remote-as 100
neighbor 192.168.2.2 password ccie
neighbor 192.168.2.2 next-hop-self
neighbor 192.168.2.2 route-reflector-client
neighbor 192.168.2.3 remote-as 100
neighbor 192.168.2.3 password ccie
neighbor 192.168.2.3 next-hop-self
neighbor 192.168.2.3 route-reflector-client

用对等体组简化后:
router bgp 100
neighbor in peer-group
neighbor in remote-as 100
neighbor in password ccie
neighbor in next-hop-self
neighbor in route-reflector-client
neighbor 192.168.2.2 peer-group in
neighbor 192.168.2.3 peer-group in
neighbor out peer-group
neighbor out password cisco
neighbor out remote-as 200
neighbor out next-hop-self
neighbor 192.168.1.1 peer-group out
neighbor 192.168.1.2 peer-group out
neighbor 192.168.1.3 peer-group out

这样的配置对以后的管理建造了良好的环境!