LAB SETUP 3

[ITboywonder]

I was wondering if anyone could help me out with this?

I am setting up a lab for the CCNA exam. I have 2 2503's with the BRI interface, 2 4500's routers and 1 4000 series routers . I want to set up a WAN/Frame Relay simulation with the 4500's and an ISDN simulation with the 2503's.

However I am unsure as to what type of serial cable to use, to set up this simulation. For example I want to configure one 4500 as a frame relay switch and then create a WAN connection to the other 4500, 4000, and one of the 2503's.

This is where I am unsure as what type of cable to use. The Serial interfaces on the 4500/4000 are 50 pin and the the 2503 are ? How do you connect these devices together?

Any kind of input will be very much appreciated.
-Nate

 

[wybnormal]

Just buy the proper back to back cable from ebay or your favorite router cabling supplier. Expect to pay about 25 or so dollars for the cables. Not a big aside from having to wait for UPS or FedEx and you want the cables RIGHT NOW

MikeS


Find me at

http://www.packetattack.com

"Take advantage of the enemy's unreadiness, make your way by unexpected routes, and attack unguarded spots."
Sun Tzu

 

[jdl508]

If you want to utilize isdn you will either need to buy an isdn simulator ($$$) or use the aux ports and a couple of external modems which should be more than enough for ccna level excercises.

 

[ITboywonder]

Thanks wybnormal and jdl508 for your post

So jdl508

from what you have told me, that means the BRI interfaces on the router are not really of any use since I dont have any kind of ISDN switch or switch simulator?

I have a few external modems around here not being used; how would I set up the physical connection of the modems to the router? from the modem to the aux port?

thanks
-nate

 

[wybnormal]

The config for the routers to use the AUX port and the modems is pretty straight forward. The big deal is to get the cabling right. You will take the crossover RJ8 cable (console cable) and get the DB25 adapter. You can make your own or the easy way is to find the Cisco DB25 adapter that says MODEM on it instead of TERMINAL. Next you will need two POTS lines.

Of course the easy is to just use the crossover RJ45 cable (console cable) between the two AUX ports

But with the modems you can try other things such as sending hayes commands and the like. This is valuable training as many, many places use modems attached to the AUX port as a "back door" to the router in case of link failure. It's a good skill to know.

Also, the modem switches will drive you crazy..

If you have a US robotics 56K,

1 - down
2 - up
3 - up
4 - down
5 - up
6 - up
7 - up
8 - down

Cisco cabling guide:

http://www.cisco.com/warp/public/701/14.html

Modem on AUX port

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

MikeS


Find me at

http://www.packetattack.com

"Take advantage of the enemy's unreadiness, make your way by unexpected routes, and attack unguarded spots."
Sun Tzu

 

[ITboywonder]

Hey MikeS

Thanks for this post dude! This is exactly the information I have been looking for.

-Nate