Please check output of "show controllers T1". If one is down, unless you want to "try" with one single circuit (requires reducing your pvc mcr to like 1.5 mbps), you need it repaired first.
Note unrelated: on a 3 mbps links, configuring vbr with an mcr of 3072, pcr 3072 and burst size 1 cells, is exactly the same than configuring UBR 3072, CBR 3072, or nothing at all! That is, the command is not doing anything.
Unfortunately we had to migrate back to our old circuit because of an unplanned outage.
That being said I wanted to include the output of the sh 'show controllers T1' command in an effort to try and find out if there is anything could be easily diagnosed(even though nothing is even plugged in). I doubt it will be of help but I wanted to try.
T1 0/1/0 is down.
Applique type is Channelized T1
Cablelength is long 0db
Transmitter is sending remote alarm.
Receiver has loss of signal.
alarm-trigger is not set
Soaking time: 3, Clearance time: 10
AIS State:Clear LOS State:Clear LOF State:Clear
Version info Firmware: 20071011, FPGA: 13, spm_count = 0
Framing is ESF, Line Code is B8ZS, Clock Source is Line.
CRC Threshold is 320. Reported from firmware is 320.
Data in current interval (840 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
[toc:faq]The ProblemOn traditional switches whenever we have a trunk
interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
[toc:faq]Introduction:Netdr is a tool available on a RSP720, Sup720 or
Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
Path First (SPF) algorithm to determine the b...