RE: Multicast drops

If you disable SPD, then you will end up having higher CPU load, and they
just become interface drops which could include the control plane traffic. I
can see the Ping's being dropped because of SPD, they aren't control-plane
traffic. What all are you polling every minute, I would think this would
lead to high cpu.

David

--
http://dcp.dcptech.com
> -----Original Message-----
> From: Persio Pucci [mailto:persio_at_gmail.com]
> Sent: Friday, June 10, 2011 2:44 PM
> To: David Prall
> Cc: ccielab_at_groupstudy.com
> Subject: 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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