BGP (Part 4) BGP Route Reflectors, Confederations, and Peer-Groups

BGP Route Reflector

Topology

R1

Basic Config

interface Serial1/0

 ip address 10.12.1.1 255.255.255.252

 serial restart-delay 0

interface Serial1/1

 ip address 10.14.1.1 255.255.255.252

 serial restart-delay 0

interface Serial1/2

 ip address 10.13.1.1 255.255.255.252

 serial restart-delay 0

interface Serial1/3

 ip address 10.110.1.1 255.255.255.252

R2

interface Serial0/0

 ip address 10.12.1.2 255.255.255.252

 clock rate 2000000

interface FastEthernet0/1

 no ip address

 shutdown

 duplex auto

 speed auto

interface Serial0/1

 ip address 10.26.1.1 255.255.255.252

 clock rate 2000000

R3

interface Serial0/0

 ip address 10.13.1.2 255.255.255.252

 clock rate 2000000

interface FastEthernet0/1

 no ip address

 shutdown

 duplex auto

 speed auto

interface Serial0/1

 ip address 10.38.1.1 255.255.255.252

R4

interface Serial0/0

 ip address 10.14.1.2 255.255.255.252

 clock rate 2000000

interface FastEthernet0/1

 no ip address

 shutdown

 duplex auto

 speed auto

interface Serial0/1

 ip address 10.47.1.1 255.255.255.252

R6

interface Loopback0

 ip address 192.168.26.1 255.255.255.252

interface Loopback1

 ip address 192.168.26.5 255.255.255.252

interface Loopback2

 ip address 192.168.26.9 255.255.255.252

interface Loopback3

 ip address 192.168.26.13 255.255.255.252

interface Loopback4

 ip address 192.168.26.17 255.255.255.252

interface FastEthernet0/0

 no ip address

 shutdown

 duplex auto

 speed auto

interface Serial0/0

 ip address 10.26.1.2 255.255.255.252

R7

interface Serial0/0

 ip address 10.47.1.2 255.255.255.252

R8

interface Serial0/0

 ip address 10.38.1.2 255.255.255.252

R10

interface Serial0/0

 ip address 10.110.1.2 255.255.255.252

IGP

R1

router eigrp 1

 network 10.12.1.1 0.0.0.0

 network 10.13.1.1 0.0.0.0

 network 10.14.1.1 0.0.0.0

 no auto-summary

R2

router eigrp 1

 network 10.12.1.2 0.0.0.0

 no auto-summary

R3

router eigrp 1

 network 10.13.1.2 0.0.0.0

 no auto-summary

R4

router eigrp 1

 network 10.14.1.2 0.0.0.0

 no auto-summary

BGP Configuration

R1

router bgp 6300

 no synchronization

 bgp log-neighbor-changes

 neighbor 10.12.1.2 remote-as 6300

 neighbor 10.12.1.2 update-source Serial1/0

 neighbor 10.12.1.2 route-reflector-client

 neighbor 10.13.1.2 remote-as 6300

 neighbor 10.13.1.2 update-source Serial1/2

 neighbor 10.13.1.2 route-reflector-client

 neighbor 10.14.1.2 remote-as 6300

 neighbor 10.14.1.2 update-source Serial1/1

 neighbor 10.14.1.2 route-reflector-client

 neighbor 10.110.1.2 remote-as 5300

 neighbor 10.110.1.2 update-source Serial1/3

 no auto-summary

R2

router bgp 6300

 no synchronization

 bgp log-neighbor-changes

 neighbor 10.12.1.1 remote-as 6300

 neighbor 10.12.1.1 next-hop-self

 neighbor 10.26.1.2 remote-as 4300

 no auto-summary

 R3

router bgp 6300

 no synchronization

 bgp log-neighbor-changes

 neighbor 10.13.1.1 remote-as 6300

 neighbor 10.13.1.1 update-source Serial0/0

 neighbor 10.13.1.1 next-hop-self

 neighbor 10.38.1.2 remote-as 2300

 neighbor 10.38.1.2 update-source Serial0/1

 no auto-summary

R4

router bgp 6300

 no synchronization

 bgp log-neighbor-changes

 neighbor 10.14.1.1 remote-as 6300

 neighbor 10.14.1.1 update-source Serial0/0

 neighbor 10.47.1.2 remote-as 3300

 neighbor 10.47.1.2 update-source Serial0/1

 no auto-summary

R6

router bgp 4300

 no synchronization

 bgp log-neighbor-changes

 network 192.168.26.0 mask 255.255.255.252

 network 192.168.26.4 mask 255.255.255.252

 network 192.168.26.8 mask 255.255.255.252

 network 192.168.26.12 mask 255.255.255.252

 network 192.168.26.16 mask 255.255.255.252

 neighbor 10.26.1.1 remote-as 6300

 no auto-summary

R7

router bgp 3300

 no synchronization

 bgp log-neighbor-changes

 neighbor 10.47.1.1 remote-as 6300

 no auto-summary

R8

router bgp 2300

 no synchronization

 bgp log-neighbor-changes

 network 192.168.35.0 mask 255.255.255.252

 network 192.168.35.4 mask 255.255.255.252

 network 192.168.35.8 mask 255.255.255.252

 network 192.168.35.12 mask 255.255.255.252

 network 192.168.35.16 mask 255.255.255.252

 neighbor 10.38.1.1 remote-as 6300

 no auto-summary

R10

router bgp 5300

 no synchronization

 bgp log-neighbor-changes

 neighbor 10.12.1.1 remote-as 6300

 neighbor 10.110.1.1 remote-as 6300

 neighbor 10.110.1.1 update-source Serial0/0

 no auto-summary

show ip BGP on R4

BGP table version is 11, local router ID is 10.47.1.1

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

*>i192.168.26.0/30  10.12.1.2                0    100      0 4300 i

*>i192.168.26.4/30  10.12.1.2                0    100      0 4300 i

*>i192.168.26.8/30  10.12.1.2                0    100      0 4300 i

*>i192.168.26.12/30 10.12.1.2                0    100      0 4300 i

*>i192.168.26.16/30 10.12.1.2                0    100      0 4300 i

*>i192.168.35.0/30  10.13.1.2                0    100      0 2300 i

*>i192.168.35.4/30  10.13.1.2                0    100      0 2300 i

*>i192.168.35.8/30  10.13.1.2                0    100      0 2300 i

*>i192.168.35.12/30 10.13.1.2                0    100      0 2300 i

*>i192.168.35.16/30 10.13.1.2                0    100      0 2300 i

BGP Confederation 

Remove all BGP configuration from route reflection

R1

router bgp 65500

neighbour re

BGP Peer Group