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BGP 149
b Specify the network that BGP sends to
[Switch A-bgp]network 1.0.0.0
c Configure the peers
[Switch A-bgp]group ex192 external
[Switch A-bgp]peer 192.1.1.2 group ex192 as-number 200
[Switch A-bgp]group ex193 external
[Switch A-bgp]peer 193.1.1.2 group ex193 as-number 200
[Switch A-bgp]quit
d Configure the MED attribute of Switch A
■ Add ACL on Switch A, enable network 1.0.0.0.
[Switch A]acl number 2000
[Switch A-acl-basic-2000]rule permit source 1.0.0.0 0.255.255.255
■ Define two route policies, one is called apply_med_50 and the other is called
apply_med_100. The first MED attribute with the route policy as network
1.0.0.0 is set as 50, while the MED attribute of the second is 100.
[Switch A]route-policy apply_med_50 permit node 10
[Switch A-route-policy]if-match acl 2000
[Switch A-route-policy]apply cost 50
[Switch A-route-policy]quit
[Switch A]route-policy apply_med_100 permit node 10
[Switch A-route-policy]if-match acl 2000
[Switch A-route-policy]apply cost 100
[Switch A-route-policy]quit
■ Apply route policy set_med_50 to egress route update of Switch C (193.1.1.2),
and apply route policy set_med_100 on the egress route of Switch B
(192.1.1.2)
[Switch A]bgp 100
[Switch A-bgp]peer ex193 route-policy apply_med_50 export
[Switch A-bgp]peer ex192 route-policy apply_med_100 export
2 Configure Switch B:
[Switch B]interface vlan-interface 2
[Switch B-Vlan-interface2]ip address 192.1.1.2 255.255.255.0
[Switch B]interface vlan-interface 4
[Switch B-Vlan-interface4]ip address 194.1.1.2 255.255.255.0
[Switch B]ospf
[Switch B-ospf-1]area 0
[Switch B-ospf-1-area-0.0.0.0]network 194.1.1.0 0.0.0.255
[Switch B-ospf-1-area-0.0.0.0]network 192.1.1.0 0.0.0.255
[Switch B]bgp 200
[Switch B-bgp]undo synchronization
[Switch B-bgp]group ex external
[Switch B-bgp]peer 192.1.1.1 group ex as-number 100
[Switch B-bgp]group in internal
[Switch B-bgp]peer 194.1.1.1 group in
3 Configure Switch C:
[Switch C]interface Vlan-interface 3
[Switch C-Vlan-interface3]ip address 193.1.1.2 255.255.255.0
[Switch C]interface vlan-interface 5
[Switch C-Vlan-interface5]ip address 195.1.1.2 255.255.255.0
[Switch C]ospf