BGP

ebgp
外部bgp邻居，不用发 next-hop-self

ibgp
内部bgp邻居，要发 next-hop-self

ibgp 案例

RS
router bgp 65500
 neighbor 10.3.0.254 remote-as 65500
 neighbor 10.3.0.254 update-source 10.3.0.253
 neighbor 10.3.0.254 route-map l3-4 in  这个后面原来匹配前缀列表的
 neighbor 10.4.0.254 remote-as 65500
 neighbor 10.4.0.254 update-source 10.4.0.253
 neighbor 10.4.0.254 route-map l1-2 in  这个后面原来匹配前缀列表的

FW
  router bgp 65501
    neighbor 10.3.0.253 remote-as 65500
    neighbor 10.3.0.253 next-hop-self  要发 next-hop-self
    neighbor 10.3.0.253 update-source ethernet0/3
    neighbor 10.4.0.253 remote-as 65500
    neighbor 10.4.0.253 next-hop-self  要发 next-hop-self
    neighbor 10.4.0.253 update-source ethernet0/4
    network 10.11.0.0/24
    network 10.12.0.0/24
    network 10.13.0.0/24
    network 10.14.0.0/24

ebgp 案例

RS 
router bgp 65500
 neighbor 10.3.0.254 remote-as 65501  这里进程号跟对方相同
 neighbor 10.3.0.254 update-source 10.3.0.253
 neighbor 10.3.0.254 route-map l3-4 in
 neighbor 10.4.0.254 remote-as 65501  这里进程号跟对方相同
 neighbor 10.4.0.254 update-source 10.4.0.253
 neighbor 10.4.0.254 route-map l1-2 in

FW
  router bgp 65501
    neighbor 10.3.0.253 remote-as 65500
    neighbor 10.3.0.253 next-hop-self  这个就不用了，删了
    neighbor 10.3.0.253 update-source ethernet0/3  接口也可以不用
    neighbor 10.4.0.253 remote-as 65500
    neighbor 10.4.0.253 next-hop-self  这个就不用了，删了
    neighbor 10.4.0.253 update-source ethernet0/4  接口也可以不用
    network 10.11.0.0/24
    network 10.12.0.0/24
    network 10.13.0.0/24
    network 10.14.0.0/24