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4.3.2. Network Route
A network route specifies how to reach a specific network. What the route names decides how the router uses it:
| Form | Example | Behaviour |
|---|---|---|
| Next hop only | ip route 10.0.0.0 255.0.0.0 192.168.1.1 | Recursive lookup to find how to reach the next hop |
| Exit interface only ("directly connected" static) | ip route 10.0.0.0 255.0.0.0 Gi0/0 | Destination treated as attached, so no recursion; on Ethernet the router must ARP for every destination, so it suits point-to-point links. Removed when that interface goes down |
| Fully specified | ip route 10.0.0.0 255.0.0.0 Gi0/0 192.168.1.1 | No recursion, and ARP only for the named next hop |
| Null0 | ip route 10.0.0.0 255.0.0.0 Null0 | Matching traffic is silently discarded |
IPv4:
Router(config)# ip route 172.16.0.0 255.255.0.0 192.168.1.1
Router(config)# ip route 172.16.0.0 255.255.0.0 GigabitEthernet0/1
IPv6:
Router(config)# ipv6 route 2001:DB8:2::/64 2001:DB8:1::1
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Written byAlvin Varughese
Founder•20 professional certifications