Shulou(Shulou.com)06/01 Report--

1. Route reflector analysis

How the route reflector works:

RR routes received from EBGP are reflected to clients and non-clients

RR routes received from clients are reflected to clients, EBGP neighbors, and non-clients

RR routes received from non-clients are reflected only to clients and EBGP neighbors, not to non-clients

2. Experimental topology

3. Basic configuration

R1 configurations

interface Loopback0

ip address 1.1.1.1 255.255.255.0

interface Serial0/0

ip address 12.1.1.1 255.255.255.0

router bgp 1

no synchronization

bgp router-id 1.1.1.1

network 1.1.1.0 mask 255.255.255.0

neighbor 12.1.1.2 remote-as 2

no auto-summary

R2 configuration

interface Loopback0

ip address 2.2.2.2 255.255.255.0

interface Serial0/0

ip address 12.1.1.2 255.255.255.0

interface Serial0/1

ip address 23.1.1.2 255.255.255.0

router ospf 110

router-id 2.2.2.2

network 2.2.2.0 0.0.0.255 area 0

network 23.1.1.0 0.0.0.255 area 0

router bgp 2

no synchronization

bgp router-id 2.2.2.2

neighbor 3.3.3.3 remote-as 2

neighbor 3.3.3.3 update-source Loopback0

neighbor 3.3.3.3 next-hop-self

neighbor 12.1.1.1 remote-as 1

no auto-summary

R3 configuration

interface Loopback0

ip address 3.3.3.3 255.255.255.0

interface Serial0/0

ip address 34.1.1.3 255.255.255.0

interface Serial0/1

ip address 23.1.1.3 255.255.255.0

router ospf 110

router-id 3.3.3.3

network 3.3.3.0 0.0.0.255 area 0

network 23.1.1.0 0.0.0.255 area 0

network 34.1.1.0 0.0.0.255 area 0

router bgp 2

no synchronization

bgp router-id 3.3.3.3

neighbor 2.2.2.2 remote-as 2

neighbor 2.2.2.2 update-source Loopback0

neighbor 4.4.4.4 remote-as 2

neighbor 4.4.4.4 update-source Loopback0

no auto-summary

R4 configuration

interface Loopback0

ip address 4.4.4.4 255.255.255.0

interface Serial0/0

ip address 34.1.1.4 255.255.255.0

router ospf 110

router-id 4.4.4.4

network 4.4.4.0 0.0.0.255 area 0

network 34.1.1.0 0.0.0.255 area 0

router bgp 2

no synchronization

bgp router-id 4.4.4.4

neighbor 3.3.3.3 remote-as 2

neighbor 3.3.3.3 update-source Loopback0

no auto-summary

4. Problems caused by horizontal segmentation

5. Configure route reflector to solve horizontal segmentation

R3 configuration

router bgp 2

neighbor 2.2.2.2 route-reflector-client

neighbor 4.4.4.4 route-reflector-client

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