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Route Information Gateway
Nov 28,2008 00:00
by
alperen
Route Information Just like with other routing protocols, you should always verify that the correct information is in the routing table: RouterB#show 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 i L1 192.168.50.0/24 [115/20] via 192.168.40.1, Serial1.1 i L2 192.168.1.0/24 [115/40] via 192.168.30.2, Serial0.1 i L2 192.168.10.0/24 [115/30] via 192.168.30.2, Serial0.1 i L2 192.168.20.0/24 [115/20] via 192.168.30.2, Serial0.1 C 192.168.40.0/24 is directly connected, Serial1.1 C 192.168.30.0/24 is directly connected, Serial0.1 As can be seen from this routing table, there is one Level 1 route and three Level 2 routes that were learned through IS-IS. You know that a route is a Level 1 IS-IS route by the code L1, and you recognize a Level 2 IS-IS route by the code L2. The code I at the beginning of the line means 226 Chapter 7 Integrated IS-IS that the route is an IS-IS route. If you would like to view only routes learned by IS-IS, the following command may be used: RouterB#show ip route isis i L1 192.168.50.0/24 [115/20] via 192.168.40.1, Serial1.1 i L2 192.168.1.0/24 [115/40] via 192.168.30.2, Serial0.1 i L2 192.168.10.0/24 [115/30] via 192.168.30.2, Serial0.1 i L2 192.168.20.0/24 [115/20] via 192.168.30.2, Serial0.1 |