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Resolving Hostnames

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1 user(s) now active on Management Console.

User Interface Menu

[M] Menus

[K] Command Line

Enter Selection:[Ctrl+Shift+6, then x]

Todd2509#

I successfully used the host table to create a session to two devices and

used the names to telnet into both devices. Notice in the entries in the show
sessions

output below that the hostname now shows up instead of the

IP address.

Todd2509#sh sess

Conn Host Address Byte Idle Conn Name

1 1900switch 192.168.0.148 0 0 switch

* 2 2501b 172.16.10.2 0 0 2501b

Todd2509#

You can remove a hostname from the table by using the no ip host

command, as in the following example:

RouterA(config)#no ip host routerb

The problem with the host table method is that you would need to create

a host table on each router to be able to resolve names. If you have many
routers and want to resolve names, using DNS is a better choice.

Using DNS to Resolve Names

If you have many devices and don't want to create a host table in each device,
you can use a DNS server to resolve hostnames.

Any time a Cisco device receives a command it doesn't understand, it tries

to resolve this through DNS by default. Watch what happens when I type the
special command todd at a Cisco router prompt.

Todd2509#todd

Translating "todd"...domain server (255.255.255.255)

% Unknown command or computer name, or unable to find

computer address

Todd2509#

www.sybex.com