Tuesday, November 6, 2012

BGP Route Reflectors




R1#show ip bgp
BGP table version is 3, local router ID is 1.1.1.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*>i2.2.2.2/32       172.12.123.2             0    100      0 i
*>i4.4.4.4/32       172.12.123.3             0    100      0 4 i


R2#show ip bgp
BGP table version is 2, local router ID is 2.2.2.2
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*> 2.2.2.2/32       0.0.0.0                  0         32768 i




R3#show ip bgp
BGP table version is 2, local router ID is 3.3.3.3
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*> 4.4.4.4/32       10.1.1.4                 0             0 4 i


R1(config)#router bgp 1235
R1(config-router)#nei
R1(config-router)#neighbor 172.12.123.2 rou
R1(config-router)#neighbor 172.12.123.2 route-re
R1(config-router)#neighbor 172.12.123.2 route-reflector-client
R1(config-router)#neighbor 172.12.123.2 route-reflector-client
*Mar  1 00:22:49.735: %BGP-5-ADJCHANGE: neighbor 172.12.123.2 Down RR client conf*Mar  1 00:22:52.071: %BGP-5-ADJCHANGE: neighbor 172.12.123.2 Up

R1(config-router)#neighbor 172.12.123.3 route-reflector-client
R1(config-router)#
*Mar  1 00:23:11.183: %BGP-5-ADJCHANGE: neighbor 172.12.123.3 Down RR client config change
*Mar  1 00:23:13.487: %BGP-5-ADJCHANGE: neighbor 172.12.123.3 Up

R2#
*Mar  1 00:22:48.887: %BGP-5-ADJCHANGE: neighbor 172.12.123.1 Down Peer closed the session
*Mar  1 00:22:50.867: %BGP-5-ADJCHANGE: neighbor 172.12.123.1 Up
R2#show ip bgp
BGP table version is 5, local router ID is 2.2.2.2
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*> 2.2.2.2/32       0.0.0.0                  0         32768 i
*>i4.4.4.4/32       172.12.123.3             0    100      0 4 i

R3#
*Mar  1 00:23:08.943: %BGP-5-ADJCHANGE: neighbor 172.12.123.1 Down Peer closed the session
*Mar  1 00:23:11.019: %BGP-5-ADJCHANGE: neighbor 172.12.123.1 Up

R3#show ip bgp
BGP table version is 5, local router ID is 3.3.3.3
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*>i2.2.2.2/32       172.12.123.2             0    100      0 i
*> 4.4.4.4/32       10.1.1.4                 0             0 4 i

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