3Com 5500G, 4210, 4200G manual Perform the following configuration on Switch B

128CHAPTER 15: ROUTING CONFIGURATION GUIDE

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router id 1.1.1.1

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vlan 1

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vlan 2

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interface Vlan-interface1

ip address 196.1.1.2 255.255.255.0

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interface Vlan-interface2

ip address 197.1.1.2 255.255.255.0

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ospf 1

area 0.0.0.0

network 196.1.1.0 0.0.0.255 area 0.0.0.1

network 197.1.1.0 0.0.0.255 vlink-peer 2.2.2.2

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■Perform the following configuration on Switch B.

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router id 2.2.2.2

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vlan 1

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vlan 2

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interface Vlan-interface1

ip address 152.1.1.1 255.255.255.0

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interface Vlan-interface2

ip address 197.1.1.1 255.255.255.0

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ospf 1

area 0.0.0.1

network 197.1.1.0 0.0.0.255 vlink-peer 1.1.1.1

area 0.0.0.2

network 152.1.1.0 0.0.0.255

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Precautions ■ Both ends of a virtual link must be ABRs configured with the vlink-peercommand.

■A virtual link cannot transit the backbone area.

■The vlink-peercommand needs to be used in the transit area.

Configuring Routing When advertising, redistributing or receiving routing information, a router can

Policiesapply some policy to filter the routing information. For example, a router receives/sends only routing information that matches certain criteria, or a routing protocol redistributes from other protocols only the routes matching certain criteria and modifies some attributes of these routes to satisfy its needs.