n IP address in a packet. The IP Routing Table To show the IP routing table, use the show ip route command: R2# sho ip route Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, 0 - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 The IP Routing Table E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static route Gateway of last resort is 11.0.0.1 to network 0.0.0.0 172.16.0.0/16 is variably subnetted, 6 subnets, 2 masks 172.16.200.0/23 is a summary, 00:56:18, Nullo 172.16.200.0/24 is directly connected, Loopback2 172.16.201.0/24 is directly connected, Serialo/o 172.16.202.0/24 is directly connected, Loopback3 172.16.100.0/23 is directly connected, Loopback4 172.16.101.0/24 [90/2172416] via 11.0.0.1, 00:53:07, FastEthernet0/1 10.0.0.0/8 is directly connected, FastEtherneto/o 11.0.0.0/8 is directly connected, FastEtherneto/1 192.168.1.0/32 is subnetted, 1 subnets 192.168.1.11 [90/156160] via 11.0.0.1, 00:00:03, FastEthernet0/1 0.0.0.0/0 [1/0] via 11.0.0.1 10.0.0.0/7 is a summary, 00:54:40, Nullo The first block of information is shown every time the command is executed. In the interest of brevity, I will remove it from most of the examples in this book. This block is a key that explains the codes listed down the left side of the routing table. The next line lists the default gateway, if one is present: Gateway of last resort is 11.0.0.1 to network 0.0.0.0 If there are two or more default gateways, they will all be listed. This is common when the default gateway is learned from a routing protocol that allows equal-cost load sharing. If two links provide access to the advertised default, and they both have the same metric, they will both be listed as default routes. In this case, packets will be equally balanced between the two links using p