3Com 10014299 manual Route Information

488CHAPTER 31: CONFIGURING IP ROUTING POLICY

Figure 158 Networking diagram of configuring OSPF route filtering

static 20.0.0.1	area 0
30.0.0.1		S0
40.0.0.1
	S0
Router A		Router B

1Configure Router A:

aConfigure static routes:

[RouterA]ip route-static 20.0.0.1 32 ethernet 0

[RouterA]ip route-static 30.0.0.1 32 ethernet 0

[RouterA]ip route-static 40.0.0.1 32 ethernet 0

bStart OSPF protocol.

[RouterA]router id 1.1.1.1

[RouterA]ospf enable

cImport static route

[RouterA-ospf]import-route static

dConfigure Serial 0, and specify id of area including the interface.

[RouterA-ospf]interface serial 0 [RouterA-Serial0]ip address 10.0.0.1 255.0.0.0

[RouterA-Serial0]link-protocol ppp

[RouterA-Serial0]interface serial 0

[RouterA-Serial0]ospf enable area 0

2Configure Router B:

aConfigure an access list:

[RouterB]acl 1

[RouterB-acl-1]rule deny source 30.0.0.0 255.255.255.0

[RouterB-acl-1]permit any

[RouterB-acl-1]quit

bStart OSPF protocol and configure the area number of this interface

[RouterB]router id 2.2.2.2

[RouterB]ospf enable

cConfigure filtering route information received for OSPF

[RouterB-ospf]filter-policy 1 import

dConfigure IP address of Serial0, encapsulated to PPP protocol.

[RouterB-ospf]interface serial 0

[RouterB-Serial0]link-protocol ppp

[RouterB-Serial0]ip address 10.0.0.2 255.0.0.0

[RouterB-Serial0]ospf enable area 0

Configuring Filtering This example describes how OSPF imports RIP route selectively.

Route Information

The router connects campus network A and campus network B, both of which use RIP as the internal routing protocol. The router needs to distribute the routes 192.1.1.0/24 and 192.1.2.0/24 of campus A in the local network. To achieve this function, RIP protocol on the router defines a filter-policy to filter the routing information, perform the route filtering function through quoting a prefix list.