11-24-2005 04:33 AM - edited 03-03-2019 11:04 AM
Hi,
I`ve had a frame-replay config working to a remote satellite location for over two years now, and on Monday it stopped working. This btw coincided with the tech at the location playing around with thier sat modem. Anyway, since then the modem has been replaced.
We are using a transmit pvc and a receive pvc, utilising the same interface offshore (tx and rx sub-intf) and different interfaces at our onshore location. When i ping through, i can see packets (although i get timed out) coming from offshore, but not being delivered offshore again through the transmit interface. The config below shows the serial interface in question:
ABZ_PIP#sh int s1/2
Serial1/2 is up, line protocol is up
Hardware is M4T
Description: ** New satellite link to Aberdeen **
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 161/255, txload 1/255, rxload 1/255
Encapsulation FRAME-RELAY, crc 16, loopback not set
Keepalive not set
Restart-Delay is 0 secs
LMI DLCI 1023 LMI type is CISCO frame relay DTE
FR SVC disabled, LAPF state down
Broadcast queue 0/64, broadcasts sent/dropped 30/0, interface br
Last input never, output 00:00:02, output hang never
Last clearing of "show interface" counters 00:14:45
Input queue: 0/75/3/0 (size/max/drops/flushes); Total output dro
Queueing strategy: dual fifo
Output queue: high size/max/dropped 0/256/0
Output queue: 0/128 (size/max)
30 second input rate 0 bits/sec, 0 packets/sec
30 second output rate 1000 bits/sec, 0 packets/sec
3 packets input, 49 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
4761979 input errors, 2678769 CRC, 0 frame, 4639 overrun, 0 i
2 abort
30 packets output, 9390 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions DCD=up DSR=up DTR=up RTS=up CTS
Note the high about of input errors and CRC errors - what would this indicate ??
I have put access-lists and ip accounting on and i can see traffic going into the transmit interace, but you`ll see that there is only 3 input packets at the far end, when i can see thousands !
I guess my question is, if after years, nothing has changed on the config, the routers have been rebooted before - why would this stop working - or could it be a WAN problem?
Thanks
11-24-2005 04:48 AM
Hi
Too much of input errors and CRC error is not a good sign for a healthy connectivity.
Keeping those error counters in mind that too in just 15 Mins i feel better to check up the interface also the cables connecting the interface to the modem.
if u have a spare port free would suggest to mirror the config and try it out by connecting on that port.
Also if u have a spare cable do swap the cable and check.
regds
11-24-2005 05:35 AM
I have swapped the physical router offshore as well as changing the interfaces and get the same problem.
I`ll perhaps try the cable.
Thanks
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