[c-nsp] Incrementing input errors and ignored counters on POS OC48interface

[Oliver Boehmer (oboehmer)]

Aaron Daubman <> wrote on Wednesday, June 07, 2006 7:40 PM:

> Greetings,
> 
> I'm trying to determine the cause of incrementing 'input error' and
> 'ignored' counters on my GSR12410's OC48 LC.
> 
> Searching around, it seems ignored errors are usually due to exceeding
> buffers/no mem drops:
> http://www.cisco.com/warp/public/63/ignored_nomem_18003.html
> 
> This doesn't appear to be the case, however (after running the show
> commands in the link above, and the input stream is only ~95Mbps...)
> 
> The network is a lab setup:
> 
>
[Ixia](OC48)<==>(OC48)[ONS15454](OC48)<==>(OC48)[GSR](GigE)<==>[Ixia](Gi
gE)
> 
> Any suggestions on how to troubleshoot further?
> 
..
> 
> GSR-1#show interfaces POS 0/0:1 controller
> POS0/0:1 is up, line protocol is up
>   Hardware is Packet over SONET
>   MTU 4470 bytes, BW 2488000 Kbit, DLY 100 usec, rely 255/255, load
>   1/255 Encapsulation HDLC, crc 32, loopback not set
>   Keepalive not set
>   Scramble enabled
>   Carrier delay is 0 msec
>   Last input 1d03h, output 00:00:11, output hang never
>   Last clearing of "show interface" counters 00:07:32
>   Queueing strategy: fifo
>   Output queue 0/40, 0 drops; input queue 0/75, 0 drops
>         Available Bandwidth 2395851 kilobits/sec
>   30 second input rate 0 bits/sec, 0 packets/sec
>   30 second output rate 0 bits/sec, 0 packets/sec
>      0 packets input, 0 bytes, 0 no buffer
>      Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
>               0 parity
>      4500773 input errors, 0 CRC, 0 frame, 0 overrun, 4500773
>      ignored, 0 abort 8 packets output, 2808 bytes, 0 underruns
>      0 output errors, 0 applique, 0 interface resets
>      0 output buffer failures, 0 output buffers swapped out
>      0 carrier transitions

you don't seem to receive a single valid packet ("Last input 1d03h"),
all of them are dropped, right? can you check "exec slot 0 show
controller event" why they are dropped? Can you check the ixia and the
ONS setup and make sure you receive valid packets?
What type of LC engine are you using?

	oli