Configure a Cisco router as an access server

 With an access-server you can remotely connect to a number of Cisco devices console and do the changes that you want without being worry of getting disconnected remotely! To set up a Cisco 2500 series router as an access server you need to connect an access server cable to the async interface on the router (basically this cable will be connected to an async interface from one side and has got a couple of console RJ45 connections on the other side, like AS25XX-RJ)

Configuration on the router:

hostname Access_Server
ip host FRS 2006 100.1.1.1
ip host SW2 2005 100.1.1.1
ip host SW1 2004 100.1.1.1
ip host R3 2003 100.1.1.1
ip host R1 2001 100.1.1.1
ip host R2 2002 100.1.1.1
!
interface Loopback0
ip address 100.1.1.1 255.255.255.255
no ip directed-broadcast

To connect to each individual host

Access_Server#r1
Trying R1 (100.1.1.1, 2001)… Open
R1#

To disconnect from each host
Ctrl+shft+6 and then x

To reconnect to a host
Ctrl+shft+6 and then session number(1 or 2 or 3 …)