Hi all,
Our company turned up two (subrate 9mb) MPLS DS3 circuits at a remote site last weekend.
I've noticed a few CRC errors on each circuit, but it doesn't appear to have any affect on performance. We've tested the load, and have no complaints from the user community.
Is there a threshold/benchmark for input/output CRC errors on a DS3 circuit? Should there be an at all?
It's a frame-relay PVC to the PE MPLS edge. The LMI count looks fine.
mpls-router-1>sh int s1/0
Serial1/0 is up, line protocol is up
Hardware is DSXPNM Serial
MTU 4470 bytes, BW 9022 Kbit, DLY 200 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation FRAME-RELAY IETF, crc 16, loopback not set
Keepalive set (10 sec)
LMI enq sent 35562, LMI stat recvd 35562, LMI upd recvd 0, DTE LMI up
LMI enq recvd 0, LMI stat sent 0, LMI upd sent 0
LMI DLCI 1023 LMI type is CISCO frame relay DTE
FR SVC disabled, LAPF state down
Broadcast queue 0/64, broadcasts sent/dropped 5927/0, interface broadcasts 0
Last input 00:00:02, output 00:00:00, output hang never
Last clearing of "show interface" counters 4d02h
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 1 packets/sec
5 minute output rate 1000 bits/sec, 3 packets/sec
5991143 packets input, 1388346109 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
3 input errors, 3 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
6594240 packets output, 741305236 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DSU mode 0, bandwidth 9000, real bandwidth 9022, scramble 1
mpls-2-router>sh int s1/0
Serial1/0 is up, line protocol is up
Hardware is DSXPNM Serial
MTU 4470 bytes, BW 9022 Kbit, DLY 200 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation FRAME-RELAY IETF, crc 16, loopback not set
Keepalive set (10 sec)
LMI enq sent 43188, LMI stat recvd 43188, LMI upd recvd 0, DTE LMI up
LMI enq recvd 0, LMI stat sent 0, LMI upd sent 0
LMI DLCI 1023 LMI type is CISCO frame relay DTE
FR SVC disabled, LAPF state down
Broadcast queue 0/64, broadcasts sent/dropped 7198/0, interface broadcasts 0
Last input 00:00:02, output 00:00:00, output hang never
Last clearing of "show interface" counters 4d23h
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 2000 bits/sec, 2 packets/sec
5 minute output rate 2000 bits/sec, 2 packets/sec
7003779 packets input, 3057692652 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
93 input errors, 93 CRC, 36 frame, 19 overrun, 0 ignored, 55 abort
6964010 packets output, 1382551929 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DSU mode 0, bandwidth 9000, real bandwidth 9022, scramble 1
Thanks as always,
Mike
