WAN - Hssi-B-Port high errors

Unanswered Question
Jan 30th, 2009

Should the invent txclock command help eliminate some of the high errors seen on these Hssi point to point connections? I'm looking for a solution that will eliminate these high errors seen. Of course the provider always says no trouble found. The core router is a 7204VXR (NPR400). The config looks like this:

interface Hssi3/0

service-policy output PTC-TO-HAN-P2P-POLICY

load-interval 30

serial restart-delay 0

Then the other side is a cisco 3845 with the same type of module:

Mx HSSI-B Port adapter, 1 port. Config looks like this:

interface Hssi2/0

load-interval 30

serial restart-delay 0

service-policy output HAN-P2P-POLICY

4896 input errors, 4783 CRC, 0 frame, 96 overrun, 0 ignored, 17 abort

I have this problem too.
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tedreese Fri, 01/30/2009 - 07:52

this is one 7204VXR side:

MTU 4470 bytes, BW 45045 Kbit, DLY 200 usec,

reliability 255/255, txload 83/255, rxload 19/255

Encapsulation HDLC, crc 16, loopback not set

Keepalive set (10 sec)

Restart-Delay is 0 secs

Last input 00:00:01, output 00:00:00, output hang never

Last clearing of "show interface" counters 01:21:46

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 91

Queueing strategy: weighted fair

Output queue: 0/1000/64/91 (size/max total/threshold/drops)

Conversations 0/179/256 (active/max active/max total)

Reserved Conversations 1/1 (allocated/max allocated)

Available Bandwidth 18018 kilobits/sec

30 second input rate 3526000 bits/sec, 2147 packets/sec

30 second output rate 14702000 bits/sec, 2564 packets/sec

9858536 packets input, 2323315924 bytes, 0 no buffer

Received 573 broadcasts, 0 runts, 0 giants, 0 throttles

0 parity

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

11329375 packets output, 3422481842 bytes, 0 underruns

0 output errors, 0 applique, 0 interface resets

0 output buffer failures, 0 output buffers swapped out

0 carrier transitions LC=down CA=up TM=down LB=down TA=up LA=down

This is the 3845 side:

MTU 4470 bytes, BW 45045 Kbit, DLY 200 usec,

reliability 255/255, txload 24/255, rxload 77/255

Encapsulation HDLC, crc 16, loopback not set

Keepalive set (10 sec)

Restart-Delay is 0 secs

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

Last clearing of "show interface" counters 1w1d

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

Queueing strategy: Class-based queueing

Output queue: 0/1000/64/0 (size/max total/threshold/drops)

Conversations 0/73/256 (active/max active/max total)

Reserved Conversations 1/1 (allocated/max allocated)

Available Bandwidth 18018 kilobits/sec

30 second input rate 13760000 bits/sec, 2422 packets/sec

30 second output rate 4416000 bits/sec, 2165 packets/sec

514107407 packets input, 2894366978 bytes, 0 no buffer

Received 89136 broadcasts, 0 runts, 0 giants, 0 throttles

0 parity

4923 input errors, 4809 CRC, 0 frame, 97 overrun, 0 ignored, 17 abort

521028387 packets output, 521951278 bytes, 0 underruns

0 output errors, 0 applique, 0 interface resets

0 output buffer failures, 0 output buffers swapped out

0 carrier transitions LC=down CA=up TM=down LB=down TA=up LA=down

Paolo Bevilacqua Fri, 01/30/2009 - 08:24

Hi, you are fine. Cannot use the byet counter because it has rolled over, but

514107407 * 800 B/pft * 8 =

Paolo Bevilacqua Fri, 01/30/2009 - 09:31

Excuse the garbage in other answer. Seems like you have a BER better that 1/10^8. Usually circuits are deemed acceptable in that area.

514107407 * 800 B/pkt * 8 bits in byte / 4923 =

668350072

tedreese Fri, 01/30/2009 - 09:34

Ok, my question is would the invent txclock config assist in clearing up these errors?

Thanks,

Ted

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