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Community Member

Alternate way to Connect to 2600 other than IP Address

I have 2 2600's that are bridged together via a T1. I'm unable to connect to the remote 2600 because whoever set it up did not configure any IP addresses on the router. Does anyone know of an alternate way to connect if the router is bridged and does not have an ip address?

4 REPLIES

Re: Alternate way to Connect to 2600 other than IP Address

One way to remotely access is to dial into router via modem, See if you can get somebody to hook a modem to aux/console of router to dial in. Or if somebody can locally access the router, that would help.

Community Member

Re: Alternate way to Connect to 2600 other than IP Address

Alternate to putting down a modem you could make use of a reverse telnet connection. All you need someone locally to do is plug a standard console cable into the aux port of the router that has an IP (R1)and then plug the other end into the console port of the router without an IP(R2).

You then enter the transport input all command on the aux port of R1 , to connect do the following on R1:

show line - ID the aux line number

Enter the telnet command as standard using a locally configured IP address and combine this with the AUX port line number plus 2000. I will use a 3600 as an example.

int s0/0 is configured with ip addr 10.1.1.1 255.255.255.252 , the line number of the aux port is 225 , now to get to the remote router all you do is :

telnet 10.1.1.1 2225

This will give you a console connection to the other router.

Hope this helps.

Community Member

Re: Alternate way to Connect to 2600 other than IP Address

I'm not sure I understand this correctly.

If I plug the console cable in R1 (I assume router 1?) and the other end into the console port of R2, I can do a reverse telnet?

That might be ok if the routers were right next to eachother, unfortunately the routers are about 150 miles away.

Cisco Employee

Re: Alternate way to Connect to 2600 other than IP Address

Here is the sample config for the modem on aux port OR modem on console port to achive dialin exec connectivity to a cisco router.

http://www.cisco.com/warp/customer/471/mod-aux-exec.html

http://www.cisco.com/warp/customer/471/50.html

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