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Lab Environment Question 1

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mmcgurty

MIS
Jun 5, 2001
84
US
I am in the process of setting up a lab scenario to test some FTP situations for Sun Solaris boxes we have at my company. Here's what I have. Two Cisco 2620's with WIC2T and WIC2A/S, four 2924XL's, two PC's one running FTP server, one running the FTP client. I want to emulate with a cable a T1 between them with no CSU/DSU's, so the router would be providing clocking. My problem is, I tried hooking a V.24 DCE (male) to a V.24 DTE (female) Cisco cables to the "smartjacks" of the WIC2T, I set the bandwidth to 1544 KB and the clock rate to 2000000. I'd get an up when I connect the cables, but a few seconds later I would get a down. I am encapsulating PPP over the link and have an IP route setup for it. Any ideas? One fellow mention that he didn't think DTE/DCE could provide more than 128K, so I would need like V.35 cables. Does someone (Blackbox?) make a V.35 male to V.35 female cable to the Cisco "Smartjacks"? Do they need to crossover? Will this get me my T1 speed I need to emulate?

I've racked my brain, and tried various cables all afternoon with no sucess.
 
the WIC-2Tis high speed.. good to something around 2Mbps..
the WIC-2A/s is good to 128Kbps sync or 115Kbps async.

Normally a DCE and DTC cable back to back works fine. You need to specify the clocking on the DCE side.

back to back PPP

back to back frame

MikeS Find me at
"Diplomacy; the art of saying 'nice doggie' till you can find a rock" Wynn Catlin
 
Interesting. I don't think we have any DTE to DCE v.35 cables. Which they show in the documentation there, we used v.24 DTE to DCE cables. However, we were setting clocking to like 20000000, no where near the clockrate they set. Perhaps that was the problem. I see the BW is 1544 on that documentation too, should I see T1 speeds with this setup as I know the BW command is just for routing purposes? I guess what I am asking, is the cable the limiter of speed or the WIC card?
 
It can be either.. the V.24 is pretty close to RS232 which has a high end of 115Kbps or so.. and that is very dependent on cable type, cable length etc..etc.. I had one piece of equipment that nominally could run the cable at 30 ft at 115Kbps.. the bad news was it was Tempest and the signal had been reduced to the point that it was unsable at 30 ft at any speed..

I have several cards right now set up with V.35 DCE/DTE cables.. works great at 1.54.. total cable is about 15 feet.

MikeS Find me at
"Diplomacy; the art of saying 'nice doggie' till you can find a rock" Wynn Catlin
 
Off the top of your head, do you know where I could get those v.35 cables that have the WIC2T connectors on them? Probably would need a male v.35 end and a female v.35 end.
 
Try pacific cable.. I've done business with them several times and each time I have been very happy with the result. This includes some custom cables I had made.


MikeS Find me at
"Diplomacy; the art of saying 'nice doggie' till you can find a rock" Wynn Catlin
 
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