I recently had a similar issue with no clock provided one end due (supposedly to some piece of telco gear). In any case we didn't know that was happening. We assumed clocking was from the line. It would fail intermittantly every few days during idle traffic times. The solution was to provide internal clocking on the unclocked end. Let's call the unclocked end "A" and the end receiving clocking "B". Until we found the trouble the quick fix was to loop B back on itself for a minute then pull the loop down. It would always resync. With an internal CSU you can view the line with show controllers t1 int number. It logs error counts in 15 min intervals. A show controllers t1 will give 24hr totals. The error message at B would be something like Loss of Frame received sending alarm. Are you saying that the remote end can put a loop back towards you and you can then do extended pings to your own ip address?
Config should look like the following: controller T1 0/1 framing esf linecode b8zs channel-group 0 timeslots 1-24 speed 64 (I learned about not including the speed parameter the hard way.) ! interface Serial0/1:0 ip address 10.xxx.1.3 255.255.255.0 > -----Original Message----- > From: Stephen Hoover [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, October 03, 2001 9:47 AM > To: [EMAIL PROTECTED] > Subject: T1 install; line protocol going down and up every 30 seconds > [7:21848] > > > 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 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=21881&t=21881 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
