Re: Multicast drops

Hmmm... I am seeing some flushes on some interfaces along the way.
Researching about it sent me to SPD (Selective Packet Discard).
Although the documentation is for 7200/7500/12000 I believe this may
fit the 7300.

Does anybody know how harmful can it be to DISABLE SPD?

Regards

On Fri, Jun 10, 2011 at 1:30 PM, 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 - 14:00:58 ART