Re: Multicast drops

Does this help?

  Last clearing of "show interface" counters 00:00:28
...
  Input queue: 1/75/0/111 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 5413000 bits/sec, 1900 packets/sec
  5 minute output rate 13000 bits/sec, 9 packets/sec

This is a GigE interface (the one connecting to the other 7300, the
interface where ping drops occour). I see flushes on this interface
(111 in 28 seconds) although the input rate is low (around 5.4Mbps).

1 - Could this be where I am loosing packets? (Remeber, this all began
because of missing multicast packets)
2 - How to fix this?

Persio

On Fri, Jun 10, 2011 at 2:28 PM, Persio Pucci <persio_at_gmail.com> wrote:
> No rate limiting anywhere...
>
> On Fri, Jun 10, 2011 at 2:12 PM, Babatunde Sanda <sbabatunde1_at_ca.rr.com> wrote:
>> Is their any rate limiting on any of the devices. I remember having a similar problem that turned out to be bit-rate limit on a hop switch. Increasing the rate solved it.
>>
>> Babatunde Sanda B.Sc (Acct.) CCNP, CCVP, CCNA(R,S,V), MCSA, N+, A+.
>> :: Sent from my Iphone. Apologies for errors and brevity. ::
>>
>> On Jun 10, 2011, at 9:30 AM, Persio Pucci <persio_at_gmail.com> wrote:
>>
>>> sh env says everything is normal (voltage, temperature, etc). Device
>>> is being polled by SNMP every minute. I have removed snmp env traps
>>> but this does not seem to affect ping drops or EnvMon rising every
>>> 10s.
>>>
>>> I don't see errors on the interface on the CLI counters, but SNMP
>>> graphs some... (http://imageshack.us/photo/my-images/34/49929742.jpg/)
>>>
>>> Tried changing OSPF SPF calc max/min timers (they were on the 10s
>>> default) but this also seemed helpless.
>>>
>>> On Fri, Jun 10, 2011 at 1:13 PM, Jason Boyers <jboyers_at_ipexpert.com> wrote:
>>>> Are you seeing any errors on those connections? Also, errors on a physical
>>>> link would not typically show up as consistent (about every 10 seconds) as
>>>> the connectivity problem you are describing. I would look into what is
>>>> causing Envmon to spike. Are you monitoring your temperature, voltage,
>>>> and/or power supply status very frequently? Or, does "show environment"
>>>> show anything out of the ordinary which may cause it to send an excessive
>>>> number of snmp traps?
>>>>
>>>> Jason Boyers - CCIE #26024 (Wireless)
>>>> Technical Instructor - IPexpert, Inc.
>>>> Mailto: jboyers_at_ipexpert.com
>>>>
>>>>
>>>>
>>>> On Fri, Jun 10, 2011 at 11:50 AM, Persio Pucci <persio_at_gmail.com> wrote:
>>>>>
>>>>> Wondering if replacing the SFP optical connection between them by
>>>>> RJ45s could be of any help (considering I have replaced the SFPs
>>>>> before to ensure it was not hardware)
>>>>>
>>>>> On Friday, June 10, 2011, Persio Pucci <persio_at_gmail.com> wrote:
>>>>>> Things got funnier...
>>>>>>
>>>>>> before my international hop I have two 7304 (being one of them the one
>>>>>> where the int'l connection is) and if I test connectivity between
>>>>>> them, I'll miss a ping packet every 10 seconds. All other packets make
>>>>>> it in 1ms or less, but every ~10 seconds I miss a ping.
>>>>>>
>>>>>> I have already changed the SFPs and patch cords on these connections,
>>>>>> have even replaced both NPE-G100 on the 7300s. I still have those
>>>>>> hicups.
>>>>>>
>>>>>> No CoPP is configured, and I can feel this symptom when accessing
>>>>>> remote terminals...
>>>>>>
>>>>>> What could it be besides hardware? The 10s constant makes me think of
>>>>>> some recurring process, but can't find anything.
>>>>>>
>>>>>>
>>>>>> On Wed, Jun 8, 2011 at 11:37 AM, Persio Pucci <persio_at_gmail.com> wrote:
>>>>>>> Hi all,
>>>>>>>
>>>>>>> I am having some trouble trying to identify and determine what is
>>>>>>> causing packet drops on my multicast network, and I am looking for
>>>>>>> someone to shed some light into it :)
>>>>>>>
>>>>>>> From my complete network ,it looks like we've been able to pin-point
>>>>>>> the leg where the packet drops occur (we've done it by capturing
>>>>>>> packets along the way and comparing the captures). The problematic leg
>>>>>>> is an international OC12 circuit, 100ms latency, from a 7304 running
>>>>>>> NPE-G100, landing on a 3750.
>>>>>>>
>>>>>>> We've tried to eliminate hardware issues, replacing all SFPs, patch
>>>>>>> cords, changing interfaces and even changing NPEs to no good. We still
>>>>>>> see some random packet drops along the route. The multicast stream is
>>>>>>> about 5Mbps and there is no concurrent traffic (yeah, an OC12 for
>>>>>>> 5Mbps...).
>>>>>>>
>>>>>>> Appreciate any help!
>>>>>
>>>>>
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Received on Fri Jun 10 2011 - 14:35:33 ART