DNS
Networking - Cisco

Using telnet to Access a Routers

Here is an actual example:

telnet 192.168.5.79 Trying 192.168.5.79... Connected to 192.168.5.79. Escape character is ‘^]’.

Password:

At this point the Main Menu is visible and all aspects of the router may be configured. Here is an example of the Main Menu. 

Copyright (c) 1994 - 2002 ZyXEL Communications Corp.
                            Prestige 643 Main Menu
   Getting Started                      Advanced Management
     1. General Setup                     21. Filter Set Configuration
     3. Ethernet Setup                    22. SNMP Configuration
     4. Internet Access Setup         23. System Password
                                                     24. System Maintenance
                                                     25. IP Routing Policy Setup
   Advanced Applications            26. Schedule Setup
     11. Remote Node Setup
     12. Static Routing Setup
     15. SUA Server Setup                 99. Exit

Building a Host Table

You must configure a host table on each network. The ip host command is used to build a host table. The show host command allows you to view the host table.

Router>enable Router#config t Router(config)#ip host RouterHome 196.162.4.2

To remove the host table:

Router>enable Router#config t Router(config)#no ip host RouterHome 196.162.4.2

DNS

When you have a lot of routers you may not want to create a host table for each router you can implement a DNS server.

The ip domain-lookup command enables DNS resolution and no ip domain-lookup disables it.

Enter the commands on the router prompt.

RouterHome(config)#ip domain-lookup RouterHome(config)#ip name-server 192.168.7.4 RouterHome(config)#ip domain-name happy.com RouterHome(config)#CTRL+Z