hapter 9: Routing and Routers First is the route code. In this case it's D, which indicates the route was learned via EIGRP (you can look this up in the block of codes at the top of the show ip route output). Next is the route itself. In this example, the route is to the subnet 172.16.101.0/24. After that are two numbers in brackets: the first number is the administrative distance (see Table 9-1) and the second number is the metric for the route. The metric is deter- mined by the routing protocol from which the route was learned (in this case, EIGRP). The next piece of information is the next hop the router needs to send packets to in order to reach this subnet. In this case, via 11.0.0.1 indicates that packets destined for the subnet 172.16.101.0/24 should be forwarded to the IP address 11.0.0.1. Finally, you have the age of the route (00:53:07), followed by the interface out which the router will forward the packet (FastEtherneto/1). I've built the sample router SO that the routing table will have one of each type of route. Again, those route types are host, subnet, summary, major network, supernet, and de- fault. The following sections explain the types in more detail. I'll show the routing table entries for each type in bold. Host Route A host route is simply a route with a subnet mask of all ones (255.255.255.255), or a prefix length of /32. In the sample routing table, the route to 192.168.1.11 is a host route: 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, FastEtherneto/1 0.0.0.0/0 [1/0] via 11.0.0.1 10.0.0.