How to configure a Cisco 2811 2800 Series Router using a NM-16A or NM-32A Async Module as a Terminal Server
Please let me know if there is anything I need to correct. I'm posting this to help others and to grow my own skills. The examples below are using the NM-16A and a 2811 Router you may need to make adjustments for your particular hardware.
Router>enable
Router#configure terminal
Router(config)#hostname Termserver
Termserver(config)#interface FastEthernet 0/0
Termserver(config-if)#ip address 192.168.111.31 255.255.255.0
Termserver(config-if)#no shutdown
Termserver(config-if)#exit
Termserver(config)#line vty 0 15
Termserver(config-line)#password YourTelnetPassword
Termserver(config-line)#logging synchronous
Termserver(config-line)#login
Termserver(config-line)#exec-timeout 15 0
Termserver(config-line)#exit
Termserver(config)#interface loopback 0
Termserver(config-if)#ip address 192.168.10.10 255.255.255.0
Termserver(config-if)#exit
Termserver(config)#line 1/0 1/15
Termserver(config-if)#transport input telnet
Termserver(config-if)#exit
Termserver(config)#interface Group-Async 0
Termserver(config-if)#no ip add
Termserver(config-if)#encapsulation slip
Termserver(config-if)#group-range 1/0 1/15
Termserver(config-if)#exit
Termserver(config)#enable secret YourSecretPassword
Termserver(config)#service password-encryption
Termserver(config)#^Z
Termserver#copy running-config startup-config
WARNING:This is not the most secure connection. Do not use telnet outside of your local network. I recommend setting up SSH v2. It doesn’t hurt even inside your local network. Further down I have directions to walk you through setting up SSH.
NOTE:When using the NM-16 or the NM-32 your port/line numbers will need to be determined. This next step will allow you to verify and figure out your port/line numbers.
Router>enable
Termserver#show line
You should see something like this:
Tty Line Typ Tx/Rx A Modem Roty AccO AccI Uses Noise Overruns Int
0 0 CTY - - - - - 8 0 0/0 -
1 1 AUX 9600/9600 - - - - - 0 0 0/0 -
* 1/0 66 TTY 9600/9600 - - - - - 3 39 438/1318 -
* 1/1 67 TTY 9600/9600 - - - - - 2 53 441/1328 -
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