Re: Multicast drops

IP input oscilates below 20%. Is it safe to disable SPD?

On Friday, June 10, 2011, David Prall <dcp_at_dcptech.com> wrote:
> Flushes are for process switched traffic. This is a function of Selective
> Packet Discard (SPD). Data Plane traffic is dropped so that Routing
> Protocols and other control plane traffic stays up. What is the CPU
> Utilization on the router, sh proc cpu sort? I'd suspect that IP Input is
> high.
>
> David
>
> --
> http://dcp.dcptech.com
>
>
>> -----Original Message-----
>> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
>> Persio Pucci
>> Sent: Friday, June 10, 2011 2:05 PM
>> To: ccielab_at_groupstudy.com
>> Subject: Re: Multicast drops
>>
>> PS: I've tried increasing the queue to 4096, no good
>>
>> On Friday, June 10, 2011, Persio Pucci <persio_at_gmail.com> wrote:
>> > 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 ensur> Blogs and organic groups at http://www.ccie.net
>>
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Received on Fri Jun 10 2011 - 15:44:28 ART