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R2(conf-if-te-2/31)#router bgp 99
R2(conf-router_bgp)#network 192.168.128.0/24
R2(conf-router_bgp)#neighbor 192.168.128.1 remote 99
R2(conf-router_bgp)#neighbor 192.168.128.1 no shut
R2(conf-router_bgp)#neighbor 192.168.128.1 update-source loop 0
R2(conf-router_bgp)#neighbor 192.168.128.3 remote 100
R2(conf-router_bgp)#neighbor 192.168.128.3 no shut
R2(conf-router_bgp)#neighbor 192.168.128.3 update loop 0
R2(conf-router_bgp)#show config
!
router bgp 99
bgp router-id 192.168.128.2
network 192.168.128.0/24
bgp graceful-restart
neighbor 192.168.128.1 remote-as 99
neighbor 192.168.128.1 update-source Loopback 0
neighbor 192.168.128.1 no shutdown
neighbor 192.168.128.3 remote-as 100
neighbor 192.168.128.3 update-source Loopback 0
neighbor 192.168.128.3 no shutdown
R2(conf-router_bgp)#end
R2#show ip bgp summary
BGP router identifier 192.168.128.2, local AS number 99
BGP table version is 1, main routing table version 1
1 network entrie(s) using 132 bytes of memory
3 paths using 204 bytes of memory
BGP-RIB over all using 207 bytes of memory
2 BGP path attribute entrie(s) using 128 bytes of memory
2 BGP AS-PATH entrie(s) using 90 bytes of memory
2 neighbor(s) using 9216 bytes of memory
Neighbor AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/Pfx
192.168.128.1 99 40 35 1 0 0 00:01:05 1
192.168.128.3 100 4 4 1 0 0 00:00:16 1
R2#
Example of Enabling BGP (Router 3)
R3# conf
R3(conf)#
R3(conf)#int loop 0
R3(conf-if-lo-0)#ip address 192.168.128.3/24
R3(conf-if-lo-0)#no shutdown
R3(conf-if-lo-0)#show config
!
interface Loopback 0
ip address 192.168.128.3/24
no shutdown
R3(conf-if-lo-0)#int tengig 3/11
R3(conf-if-te-3/11)#ip address 10.0.3.33/24
R3(conf-if-te-3/11)#no shutdown
R3(conf-if-te-3/11)#show config
!
interface TenGigabitEthernet 3/11
ip address 10.0.3.33/24
no shutdown
R3(conf-if-lo-0)#int tengig 3/21
R3(conf-if-te-3/21)#ip address 10.0.2.3/24
R3(conf-if-te-3/21)#no shutdown
R3(conf-if-te-3/21)#show config
!
interface TenGigabitEthernet 3/21
ip address 10.0.2.3/24
Border Gateway Protocol IPv4 (BGPv4)
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