CCIE实验室考试指南(2)[1]

【网络综合 - Cisco认证】
Lab 02 -

　　Policy Routing
　　The following scenario refers to the diagram below.

　　Scenario:
　　All routers are configured in a single OSPF area.
　　Router_C, based on the cost metric for OSPF will send all packets with
　　a destination network address of 10.4.0.0 out the E0 interface.
　　Problem:
　　Have all packets destined for network 10.4.0.0 exit the Serial 0
　　Router_C.
　　Router_C#sh ip route
　　Codes: C - connected, S - static,
　　I - IGRP,
　　R - RIP, M - mobile, B - BGP,
　　D - EIGRP,
　　EX - EIGRP external, O - OSPF,
　　IA - OSPF inter area,
　　N1 - OSPF NSSA external type 1,
　　N2 - OSPF NSSA external type 2,
　　E1 - OSPF external type 1,
　　E2 - OSPF external type 2, E - EGP,
　　i - IS-IS,
　　L1 - IS-IS level-1,
　　L2 - IS-IS level-2,
　　* - candidate default,
　　U - per-user static route,
　　o - ODR
　　Gateway of last resort is not set
　　10.0.0.0/16 is subnetted, 3 subnets
　　C 10.2.0.0 is directly connected,
　　Serial0
　　C 10.3.0.0 is directly connected,
　　Ethernet0
　　O 10.4.0.0 [110/74] via 10.3.0.1,
　　00:00:13, Ethernet0 　Solution:
　　Policy routing will allow you to configure a route map. The route map
　　will be used by the router in lieu of destination routing.
　　In this scenario the best route to the destination network 10.4.0.0 is
　　to go ethernet. We want to force the route to take the serial
　　connection.
　　Step 1
　　Configure a route map tag. I chose "takeserial".
　　Step 2
　　Point the route map to the tag. Don’t let the 10 shake you it is just a
　　sequence number.
　　Router_C(config)#route-map
　　takeserial permit ?
　　<0-65535>
　　Sequence to insert to/delete
　　from existing route-map entry
　　Step 3
　　Identify which packet should be route mapped. In our example we will
　　match the ip address of access list 1.
　　Step 4
　　Tell the router where to send the matched packet. WeCisco认证