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 18.104.22.168 255.255.255.255
no ip directed-broadcast
ip host S3 2011 22.214.171.124
ip host R7 2007 126.96.36.199
ip host R6 2006 188.8.131.52
ip host R4 2004 184.108.40.206
ip host R3 2003 220.127.116.11
ip host S2 2010 18.104.22.168
ip host S1 2009 22.214.171.124
ip host R5 2005 126.96.36.199
ip host R2 2002 188.8.131.52
ip host R1 2001 184.108.40.206
ip host S4 2012 220.127.116.11
ip host R8 2008 18.104.22.168
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 22.214.171.124. 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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