Help...CISCO....

Help!!! My boss has suddenly decided to leave the business and i need information fast!!! First question..how do i find out the IP address of a Cisco router thats sitting on my local network....

Thanks...

Hum.. need more details...
Is the router your gateway?
Do you have telnet/console access to the router?

Ammo

We have 3 Cisco routers on our lan, 2 of them are unused and one of them is the gateway, i'm trying to find out which one, i have console access to the router but not at the moment as i'm at home...

If that router is the gateway, you should be able to find the ip address of the router on your terminal at work, by looking at the properties for your network card and it should be specified what the ip address for the gateway is.

Hope this helps.

The trouble is i have 3 Cisco Routers on the lan at work...2 of them are not in use so i want to take them off the network. The properties for my network card does indeed point to one of them but i don't know which one it points to. So i was planning on consoling into them to find out the ip address and details of each router..how do i do that ?

On the routers, logon on at the console or via telnet,
(if via telnet, you will probably need to enter another password first),
go to "enable mode" (type "enable" )
enter the enable password,
type "show running-config".

This will print the current configuration of the router, in which you will find the IP address(es) of the router.

Ammo

i've inherited these routers along with the rest of the network, how do i find out the enable password ?

Dove - you will probably have to boot into ROMMON so you can recover/change the passwords. Since I do not know what model you need, I searched for a link that shows links to discuss different models. The procedure could be slightly different per model. The link can be found here . I hope this helps. Don't you hate inheriting a network that's not documented? Good luck.

Thanks...i'll try it out on Tuesday and let you know how i get on!!!

another good simple solution for remote management checks is to grab a utility such as superscan and scan out your network for open ports.

I commonly do this when looking for switches, or wiping used NAS appliances (typically they have an open port 80).

just scan out for an open port 23, you may get a few, but you can telnet into each one and find out what it is.

well he'd still need the passwords...

Ammo

Login to the router and run a "show ip interface brief" this will list all ip address and interfaces. Or refer to documentation *if you have any about the network. or ipconfig on your workstation and default gateway is usually the routers interface your connected to. telnet to that ip address to get to the router.

hope it helps

JRC, now that you mentioned that, I just thought of something. Dove: once you are able to recover the passwords and get logged in with no problem, you may want to try the "show cdp neighbors command." It uses the Cisco Discovery Protocol to show what other routers are directly connected. By using this, you can find out the IP address of each directly connected router, then telnet to it and execute the show cdp neighbors command again to get the information for the next directly connected router, and so on and so forth, until you have your network mapped out! I hope this helps you in establishing control of your new network. Keep me posted. I am interested in finding how this works out for you. I can learn from your experience as well. That's what it's all about...


Oh, here is some more information on CDP.


Peace and Blessings.

show cdp nei detail - gets ip address of neighbour. Remember the detail cause with out it you get no ip address

Good point cereal...I forgot to mention that part.

Is there a default Cisco enable password ??

It is either blank or cisco depending on what piece of Cisco equipment you are using.