Here is my 2511 config. Adapt as needed..
Telnet onto the 2511 Ethernet interface followed by the port.
Telnet 192.168.1.253 2001 for the router on Async 1.
Current configuration : 1314 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname cisco2511
!
boot-start-marker
boot-end-marker
!
enable secret xxx
enable password password
!
no aaa new-model
ip subnet-zero
no ip routing
ip host R1 2001 192.168.1.253
ip host R2 2002 192.168.1.253
ip host R3 2003 192.168.1.253
ip host R4 2004 192.168.1.253
ip host R5 2005 192.168.1.253
ip host R6 2006 192.168.1.253
ip host R7 2007 192.168.1.253
ip host R8 2008 192.168.1.253
ip host R9 2009 192.168.1.253
ip host R10 2010 192.168.1.253
ip host R11 2011 192.168.1.253
ip host R12 2012 192.168.1.253
ip host R13 2013 192.168.1.253
ip host R14 2014 192.168.1.253
ip host R15 2015 192.168.1.253
ip host R16 2016 192.168.1.253
!
!
!
!
interface Ethernet0
ip address 192.168.1.253 255.255.255.0
no ip route-cache
no keepalive
!
interface Serial0
no ip address
no ip route-cache
shutdown
!
interface Serial1
no ip address
no ip route-cache
shutdown
!
ip http server
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.1.254
!
!
!
line con 0
line 1 16
session-timeout 30
exec-timeout 0 0
no exec
transport input telnet
line aux 0
line vty 0 4
password password
login
!
end
