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  R1(config)#no router bgp 1
  R1(config)#router bgp 3
  R1(config-router-bgp)#neighbor 192.168.12.2 remote-as 2
  R1(config-router-bgp)#
  

  

 conf t
  ip routing
  hostname R1
  int et1
  no sw
  ip address 192.168.12.1/24
  router bgp 1
  neighbor 192.168.12.2 remote-as 2
  int lo0
  ip address 1.1.1.1/24
  router bgp 1
  network 1.0.0.0
  network 1.1.1.1
  no router bgp 1
  show ip bgp sum
  router bgp 1
  neighbor 192.168.12.1 remote-as 2
  show ip bgp
  show ip bgp sum
  neighbor 192.168.12.2 remote-as 2
  no neighbor 192.168.12.1 remote-as 2
  show ip bgp sum
  network 1.1.1.0/24
  nexit
  exit
  no router bgp 1
  router bgp 3
  neighbor 192.168.12.2 remote-as 2

R2(config-router-bgp)#show hist
  en
  conf t
  ip rout
  ip routing
  hostname R2
  int et1
  no sw
  ip add 192.168.12.2/24
  ping 192.168.12.1 source 192.168.12.2
  router bgp 2
  neighbor 192.168.12.1 remote-as 1
  show ip bgp sum
  show ip bgp
  show ip bgp *
  show ip bgp

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