3Com 10014299 manual RouterC-acl-1rule permit source 1.0.0.0

476CHAPTER 30: CONFIGURING BGP

2Configure Router B:

[RouterB] interface serial 0

[RouterB-Serial0]ip address 192.1.1.2 255.255.255.0 [RouterB] interface serial 1

[RouterB-Serial1]ip address 194.1.1.2 255.255.255.0 [RouterB] ospf enable

[RouterB-ospf]network 194.1.1.0 0.0.0.255 area 0

[RouterB-ospf]network 192.1.1.0 0.0.0.255 area 0 [RouterB] bgp 200

[RouterB-bgp]undo synchronization

[RouterB-bgp]peer 192.1.1.1.1 as-number 100

[RouterB-bgp]peer 194.1.1.1.1 as-number 200

[RouterB-bgp]peer 195.1.1.1.2 as-number 200

3Configure Router C:

[RouterC] interface serial 0

[RouterC -Serial]ip address 193.1.1.2 255.255.255.0 [RouterC] interface serial 1

[RouterC-Serial1]ip address 195.1.1.2 255.255.255.0 [RouterC] ospf enable

[RouterC-ospf]network 193.1.1.0 0.0.0.255 area 0

[RouterC-ospf]network 195.1.1.0 0.0.0.255 area 0 [RouterC] bgp 200

[RouterC-bgp]undo synchronization

[RouterC-bgp]peer 193.1.1.1 as-number 100

[RouterC-bgp]peer 194.1.1.2 as-number 200

[RouterC-bgp]peer 195.1.1.1 as-number 200

Set the local preference attribute of Router C.

■Add access list 1 to Router C and enable network 1.0.0.0.

[RouterC-bgp] acl 1

[RouterC-acl-1]rule permit source 1.0.0.0 0.255.255.255

■Define a routing diagram named localpref. In the diagram, the local preference of the route matching access list 1 is set to 200 and the local preference of the route not matching access list 1 is 100.

[RouterC-acl-1]route-policy localpref permit 1 [RouterC-route-policy] if-match ip address 1

[RouterC-route-policy]apply local-preference 200

[RouterC-route-policy]route-policy localpref permit 2

[RouterC-route-policy]apply local-preference 100

■Apply this routing diagram to the entry traffic from BGP peer 193.1.1.2 (Router A).

[RouterC] bgp200

[RouterC-bgp]peer 193.1.1.1 route-policy localpref import

4Configure Router D:

[RouterD] interface serial 0

[RouterD-Serial0]ip address 194.1.1.1 255.255.255.0 [RouterD] interface serial 1

[RouterD-Serial1]ip address 195.1.1.1 255.255.255.0 [RouterD] ospf enable

[RouterD-ospf]network 194.1.1.0 0.0.0.255 area 0

[RouterD-ospf]network 195.1.1.0 0.0.0.255 area 0