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Matching errors on DS3 Frame Relay Interface.

I'm getting the following errors on the WAN interface. The errors increase even during times of low traffic usage. Is this normal for a DS3 interface? Sho interface is below. The input, crc and overunn errors match. The output and underrun

Router#sho int s1/0

Serial1/0 is up, line protocol is up

Hardware is DSXPNM Serial

Internet address is x.x.x.x/30

MTU 4470 bytes, BW 44210 Kbit, DLY 200 usec,

reliability 254/255, txload 12/255, rxload 90/255

Encapsulation FRAME-RELAY IETF, crc 16, loopback not set

Keepalive set (10 sec)

LMI enq sent 5544, LMI stat recvd 5544, LMI upd recvd 0, DTE LMI up

LMI enq recvd 0, LMI stat sent 0, LMI upd sent 0

LMI DLCI 0 LMI type is ANSI Annex D frame relay DTE

Broadcast queue 0/64, broadcasts sent/dropped 76/0, interface broadcasts 0

Last input 00:00:00, output 00:00:00, output hang never

Last clearing of "show interface" counters 15:24:10

Input queue: 0/75/556/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: fifo

Output queue: 0/40 (size/max)

5 minute input rate 15617000 bits/sec, 1846 packets/sec

5 minute output rate 2110000 bits/sec, 1352 packets/sec

40087892 packets input, 425275878 bytes, 66 no buffer

Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

100785 input errors, 100782 CRC, 0 frame, 100785 overrun, 0 ignored, 0 abort

30993958 packets output, 1383263406 bytes, 115859 underruns

115859 output errors, 0 collisions, 0 interface resets

0 output buffer failures, 0 output buffers swapped out

0 carrier transitions

DSU mode 0, bandwidth 44210, real bandwidth 44210, scramble 0

1 REPLY
Blue

Re: Matching errors on DS3 Frame Relay Interface.

NO,

this is not normal for a DS3 interface.

as you expect, all zeros for those errors are what should be seen in a good/normal operation scenario.

since there are zero carrier transitions, it is likely due to a problem on the line. ie: bad coax termination; bad coax cable; problem on line between your site and telco, etc.

i would call the telco and verify all your DS3 parameters as well as perform testing of the circuit if these continue.

(crc can be caused by misconfiguration, dropped packets, clocking issues, framing issues, line coding...)

please see the following link for more info on T1/T3 troubleshooting as well:

http://www.cisco.com/en/US/tech/tk713/tk628/technologies_tech_note09186a00801095a3.shtml

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