The lines are clocked, 1.5M in T1 for example but the end devices also need to be in synch. In frame relay the frame switch provides clock so you set both ends DSU's to clock off the line and a point to point connection you pick one DSU to provide clock and one to synch off others clock since there is no switch.
Dave John Neiberger wrote: > > Perhaps I don't have enough time in the field to answer this, but in my > experience I've never installed a T-1 where the service provider line > did not provide the clocking. Every single T-1 in our network (and > that's a bunch) gets its clock from the line. I have no idea why they > would choose not to provide clocking and I have no idea what to do to > resolve it. > > so, I'm not much help! :-) I just wanted to chime in on how odd I > thought it was that they weren't providing the clock. > > good luck, > John > > >>> "Stephen Hoover" 10/3/01 8:46:55 AM >>> > I am working on point to point T1 install at a small office. The line > protocol keeps going up and down every 30 seconds and I cannot ping > myself. > My keepalive timers are not incrementing. The telco provider says that > they > are not providing the clock on this line and that we need to do so > ourselves. My condition remains the same whether I set my clock to line > or > internal. The router on the remote end however seems to be ready to go > when > they set their clock source to line. When they set to internal, the > telco > provider sees framing errors on the line. > > Does it seem feasible that there is a clock source somewhere back > towards > there end of the line that their router can receive and mine cannot? I > am > working with the IT staff on the remote end of the link, but none of us > seem > to have any idea where else to go with this problem. > > My system works fine when I put my DSU in local loopback and it works > when I > put their DSU in remote loopback - so I *think* the hardware is sound. > > Any help is appreciated! > > Thanks, > Stephen Hoover -- 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=21873&t=21873 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
