config
- router [router-name]
- [no] interface interface-name
- address {ip-address/mask | ip-address netmask} [broadcast {all-ones | host-ones}]
- no address
- delayed-enable
- no delayed-enable
- description long-description-string
- no description
- icmp
- redirects [number seconds]
- no redirects
- ttl-expired [number seconds]
- no ttl-expired
- unreachables [number seconds]
- no unreachables
- [no] loopback
- [no] shutdown