What serial cable do I need for Lab (cisco 2600 and 1600)

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Sep 9th, 2008
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Hi,


I am unsure of what cables I need for my small lab. I would like to simulate a WAN I have a spare Cisco 2600 router and a spare Cisco 1600 but no cables.


I was told I could create a WAN by getting 2 serial cables and reversing one so I don't need a CSU/DSU.


Any idea what I need to get, I might just get them off ebay.


Thanks

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whiteford Tue, 09/09/2008 - 01:45
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Hi, I'm not near the 1600 at the moment, all I know is it was originally on a 2mb lease line connected to a NTE device which had the fibre line connected to it which I think is just the CSU/DSU.


Can

whiteford Tue, 09/09/2008 - 12:37
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Thanks, what config do I need to add on the DCE router?

whiteford Wed, 09/10/2008 - 09:21
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Great link, but does it matter which one is the DCE and which one is the DTE router, or is it up to me?


I have 2 routers set up without setting the clock ant I can ping from each side, should this happen eventhough I have yet to configure the clock?

Edison Ortiz Wed, 09/10/2008 - 09:37
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The cable connection will determine which router will be the DCE and DTE. Most cable vendors will physically label it as such.


So, if you've configured 2 routers back-to-back serial and can ping without the clock being configured? That's odd.


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whiteford Wed, 09/10/2008 - 09:56
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That's what I thought, can I run any commands to help?


I'm going to double check.

Edison Ortiz Wed, 09/10/2008 - 10:28
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This will tell you the cable the router has detected on its end.


On this example, the connecting cable is DTE end.


Router#sh contr | i DTE|DCE

DTE V.35 TX and RX clocks detected.

DTE V.35 clocks stopped.


HTH,


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whiteford Wed, 09/10/2008 - 11:10
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Strange, I get this:


LAN-Side#sh contr | i DTE|DCE

DCE 530, no clock

DCE 530, no clock


Edison Ortiz Wed, 09/10/2008 - 11:13
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Please post the show interface from both end of this link.


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whiteford Wed, 09/10/2008 - 10:05
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...and back-to-back is the term for the DTE-DCE crossover in this case?


Thanks Edison

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