3Com 7700 Configuration Manual page 147

Add ACL on Switch A, enable network 1.0.0.0.
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[Switch A] acl number 1
[Switch A-acl-basic-1] 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
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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 1
[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 1
[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
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(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 193.1.1.2 route-policy apply_med_50 export
[Switch A-bgp] peer 192.1.1.2 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] area 0
[Switch B-ospf-area-0.0.0.0] network 194.1.1.0 0.0.0.255
[Switch B-ospf-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] peer 192.1.1.1 as-number 100
[Switch B-bgp] peer 194.1.1.1 as-number 200
3 Configure Switch C:
BGP 139