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Chapter 9
BGP Scalability and Advanced Features
RouterB(config)#interface serial 2
RouterB(config-if)#ip address 10.11.15.1 255.0.0
RouterB(config-if)#no shut
RouterB(config-if)#
Connecting to two or more simulated ISPs might be a problem because it
requires the use of more than two serial ports on the router. I used a 3600
series. If you do not have a router available with more than two serial links,
simulate only one ISP. BGP can load balance over as many as six external
links to ISPs.
Here's the suggested configuration for RouterC:
RouterC(config)#router bgp 7501
RouterC(config-router)#network 172.16.0.0 mask
255.255.255.0
RouterC(config-router)#neighbor 172.16.11.1 remote-as 7501
RouterC(config-router)#exit
RouterC(config)#router ospf 10
RouterC(config-router)#network 172.16.0.0 0.0.255.255 area 0
RouterC(config-router)#default-information originate
always
RouterC(config-router)#exit
RouterC(config)#interface ethernet 0
RouterC(config-if)#ip address 172.16.15.1 255.255.255.0
RouterC(config-if)#no shut
RouterC(config-if)#exit
RouterC(config)#interface serial 1
RouterC(config-if)#ip address 172.16.12.254 255.255.255.0
RouterC(config-if)#no shut
RouterC(config-if)#exit
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