CCIE Security Blog

Router1(config-router)#do sh ip int br
FastEthernet0/0 136.1.13.1
Loopback0 150.1.1.1

Router1(config)#router bgp 11
Router1(config-router)#neighbor 136.1.23.2 remote-as 22
Router1(config-router)#neighbor 136.1.23.2 ttl-security hops 2
Router1(config-router)#network 150.1.1.1 mask 255.255.255.255
Router1(config-router)#exit

router bgp 11
no synchronization
bgp log-neighbor-changes
network 150.1.1.1 mask 255.255.255.255
neighbor 136.1.23.2 remote-as 22
neighbor 136.1.23.2 ttl-security hops 2
no auto-summary
!
Router2(config)#router bgp 22
Router2(config-router)#neighbor 136.1.13.1 remote-as 11
Router2(config-router)#neighbor 136.1.13.1 ttl-security hops 2
Router2(config-router)#network 150.1.2.2 mask 255.255.255.255
Router2(config-router)#exit

router bgp 22
no synchronization
bgp log-neighbor-changes
network 150.1.2.2 mask 255.255.255.255
neighbor 136.1.13.1 remote-as 11
neighbor 136.1.13.1 ttl-security hops 2
no auto-summary

Router2#sh ip int br
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 136.1.23.2
Loopback0 150.1.2.2

Router2#sh ip bgp summary
BGP router identifier 150.1.2.2, local AS number 22
BGP table version is 2, main routing table version 2
1 network entries using 120 bytes of memory
1 path entries using 52 bytes of memory
1/1 BGP path/bestpath attribute entries using 124 bytes of memory
0 BGP route-map cache entries using 0 bytes of memory
0 BGP filter-list cache entries using 0 bytes of memory
BGP using 296 total bytes of memory
BGP activity 1/0 prefixes, 1/0 paths, scan interval 60 secs

Neighbor    V   AS    MsgRcvd     MsgSent     TblVer    InQ    OutQ   Up/Down State/PfxRcd
136.1.13.1   4   11       0                   0                   1              0        0              never      Idle