Re: Multicast drops

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 - 12:13:24 ART