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Understanding the Network: A Practical Guide to Internetworking by Martin J. Michael

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Displaying General Routing Information

There are several IOS commands used for controlling and displaying information about IP routing.

Display commands:

<show ip route>
<show ip route connected>
<show ip route [address/hostname]>
<show arp>
<show ip protocol>
<show ip masks>
<show ip masks [network address]>
<traceroute>

Control commands:

<clear ip route *>
<clear ip route [network] [mask]>
<clear arp>

Displaying IP Network Information

In Chapter 7, "Introduction to Cisco Routers," the <show ip route> user EXEC command was introduced. Now, let's take a closer look at the IOS's route table display:

 BBR-172#sh ip route Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA ...

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