Cisco sells DCE and DTE cables and some of the routers are soooo smart they know if they are conneced to one or the other, i.e. you cant set the clock rate if you have a DTE cable conected:
C3640B(config)#inter ser 1/0 C3640B(config-if)#clock rate 154000 %Error: This command applies only to DCE interfaces On the above example are two V.35 cable connected b-b and I attempted to set the clockrate on the DTE. Dave Sam Deckert wrote: > > Thanks Tim, that was great! > > So, a special db60-db60 cable can be used for back-to-back connections, and > will work as long as one router is set to be the DCE and provide a > clockrate. Does this cable have any special pinouts or anything? Is there > a diagram somewhere? Did a search on google, no luck tho! > > Also, would a setup with two V.35 cables (one male, one female) connected > together between two routers work in the same way? > > Thanks for your help! > > Sam. > > ----- Original Message ----- > From: "Ouellette, Tim" > To: > Sent: Thursday, October 25, 2001 9:49 PM > Subject: RE: DTE/DCE explanation please [7:24071] > > > Sam, > > > > "the whole DTE/DCE" thing is related directly to where the clocking comes > > from. In a "typical" wan, the clocking to your router's serial port comes > > from an external CSU/DSU that your carrier may provide. Therefor, the > > carried is the DCE and your router is the DTE. In a home environment, if > > you have your routers connected via a db60->db60 cable, one of those > routers > > needs to supply the clock rate. Check your cable because one end is > > probably labelled as DCE and the other DTE. If it's not, trying using the > > "show controller serial x" and that should tell you the type that is > plugged > > into it. On the DCE side of that connected link, you need to use the > "clock > > rate" command to supply clocking to the other side. > > > > I don't think there is a "DTE cable" I believe it's more of you order the > > proper pin size (db60 on 2500's and db60 or db50 on the 4000's) for each > > side. > > > > Hope that helps. > > > > Tim > > > > > -----Original Message----- > > > From: Sam Deckert [SMTP:[EMAIL PROTECTED]] > > > Sent: Wednesday, October 24, 2001 10:54 PM > > > To: [EMAIL PROTECTED] > > > Subject: DTE/DCE explanation please [7:24071] > > > > > > Hello, > > > > > > Could someone kindly explain the whole DTE / DCE thing in relation to > > > setting > > > up a home lab and using routers back to back? > > > > > > I believe that DTE is male and DCE female, but what are the other > > > differences? > > > > > > When connecting a router to a CSU/DSU, would you always order a DTE > cable? > > > > > > Thanks for any help anyone can provide! -- David Madland Sr. Network Engineer CCIE# 2016 Qwest Communications Int. Inc. [EMAIL PROTECTED] 612-664-3367 "Emotion should reflect reason not guide it" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=24105&t=24071 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
