To Setup a Terminal server on cisco router you require Async module on the router. Cisco routers like 2511 comes up with such interfaces. You will need Octal cable to connect the console RJ-45 of devices to the Async interface.
The lines for 2511 starts from 2001 to 2008 for an Async interface. Below is the sample config which i use for my Lab's access server.
ip address 22.214.171.124 255.255.255.255
no ip directed-broadcast
ip host S3 2011 126.96.36.199
ip host R7 2007 188.8.131.52
ip host R6 2006 184.108.40.206
ip host R4 2004 220.127.116.11
ip host R3 2003 18.104.22.168
ip host S2 2010 22.214.171.124
ip host S1 2009 126.96.36.199
ip host R5 2005 188.8.131.52
ip host R2 2002 184.108.40.206
ip host R1 2001 220.127.116.11
ip host S4 2012 18.104.22.168
ip host R8 2008 22.214.171.124
line con 0
exec-timeout 0 0
transport input none
line 1 16
transport input all
Now that the router is configured we use the following commands to navigate.
- to access a device
telnet 126.96.36.199. 2001
- to switch between active sessions
ctrl-shift-6-x will bring you back to terminal server
show sessions will display the active sessions
entering a number of a session will let you access that session
- to disconnect a session
use the disconnect command
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