Frame Relay between 2 routers without Frame Relay Switch

[SmokeyBandid]

First I want to say that I REALLY like this forum and have learned alot from it.

I've got a little problem ->

I've got 2 Ciscco 2500 routers in a testlab.
Now I want to configure the routers to communicate wich each other with FrameRelay encapsulation BUT without any frame relay switch. I Just connected the Serial 0 of router a to the Serial 1 of router B with V.35 Cables (DCE,DTE)

Now my question is how do i make it work ?

1. Do i have to assign DLCI values to the Interfaces ?
2. Do i have to use "FRAME-RELAY ROUTE 21 Serial 1 20" ?
3. Frame-Relay Local-DCI ?
4. Frame-Relay Map IP 192.168.0.1 21 ?

Could someone please help me to configure this TestLab ?

 

[svermill]

I cringe every time I get ready to say that something can't be done. It usually turns out to be wrong. However...

In order for frame relay to work, I think you need LMI. A router can be configured with the

router(config)#frame-relay switching
router(config-if)ip address 4.3.2.1 255.255.255.0
router(config-if)#encap frame
router(config-if)#frame-relay intf-type dce
router(config-if)#clock rate xxxxxx
router(config-if)#frame-relay map ip 1.2.3.4 101 broadcast

and then on the other router

other(config-if)#ip address 1.2.3.4 255.255.255.0
other(config-if)#encap frame
other(config-if)#frame-relay map ip 4.3.2.1 101 broadcast

So I hope that when you said you didn't want a switch, you just meant a separate switch. I'm pretty sure you need to do something like what I have posted for back-to-back frame relay. By the way, I have done this and it works well. Let me know if I forgot any steps.

 

[hexn]

Yes you can, and it is actually VERY easy.

It is all expained here and a bag of chips:

http://www.cisco.com/warp/public/125/frbacktoback.html

 

[jeter]

these guys are right. check out this cisco web site.

http://www.cisco.com/warp/public/125/frbacktoback_hybrid.html

Jeter@LasVegas.com
J.Fisher CCNA

 

[SmokeyBandid]

Thanks People , this works like a charm

I never used the Cisco Technical Tips site :

http://www.cisco.com/public/technotes/serv_tips.shtml

Very usefull Site!

Thanks for the help people, great forum!