Click on the routers in the topology below to view their configurations.
router 2500 AUX----NULL MODEN CABLE-----ROUTER 2500 AUX
Before You Begin This configuration has Cisco 2500-series routers back-to-back using the async AUX port. The Cisco AUX port is connected to another Cisco AUX port running PPP. The connection has been configured to allow IP for a permanent connection.
Ingredients For this recipe, you need the following:
A null modem cable.
You may also need an RJ45-to-DB25 adapter converter. For more information on cables, see the Cables documentation.
Router 1 version 11.1 service udp-small-servers service tcp-small-servers ! hostname Router1 ! interface Ethernet0 no ip address shutdown ! interface Serial0 no ip address shutdown ! interface Serial1 no ip address shutdown ! interface Async1 ip address 192.168.10.1 255.255.255.0 ! -- the IP address on the AUX ports of both routers must be in the same subnet encapsulation ppp ! -- set PPP as encapsulation async dynamic routing async mode dedicated ! no ip classless ip route 0.0.0.0 0.0.0.0 Async1 logging buffered ! line con 0 exec-timeout 0 0 line aux 0 modem InOut transport input all rxspeed 38400 txspeed 38400 flowcontrol hardware line vty 0 4 login ! end
Router 2 version 11.1 service udp-small-servers service tcp-small-servers ! hostname Router2 ! ! interface Ethernet0 no ip address shutdown ! interface Serial0 no ip address shutdown !
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