[c-nsp] FE ignored errors

[Jon Lewis]

I am using dcef and don't have any VIP2-40s.  All our VIPs are VIP2-50
(128/8).

On Mon, 20 Dec 2004, G wrote:

> Just out of curiosity... Are you running dCEF or just regular CEF.
> I'm guessing that with the VIP2-40 that you're not but if you are that
> could also be lending to the problem at hand.
>
> On Mon, 20 Dec 2004 10:55:55 -0500 (EST), Jon Lewis <jlewis at lewis.org> wrote:
> > On Mon, 20 Dec 2004, Gert Doering wrote:
> >
> > > On Sun, Dec 19, 2004 at 06:10:19PM -0500, Jon Lewis wrote:
> > > > I've recently started seeing large bursts (sometimes tens, usually
> > > > thousands) of input ignored errors on several 7500 routers FE
> > > > interfaces (rsp4, vip2-50, PA-FE-TX).  It's even happening on relatively
> > > > low traffic ones that are only doing about 1/5 line rate traffic.
> > >
> > > We do also see them (on NPE-400/PA-FA-TX and on 7500/VIP2-50/PA-FE-TX).
> >
> > How many are you seeing?  We're seeing bursts of thousands and wondering
> > if it's impacting our network.  I was talking to someone online last night
> > who suggested it could be MEMD starvation.
> >
> > show control vip N accum confirms this.  We're dropping packets because
> > the VIPs can't get buffers on the RSP MEMD, and at times are failing to RX
> > buffer.
> >
> > I've turned off the policy routing, and it made no difference.
> >
> > Are you still setting hold-queue <N> <in|out> on your higher traffic
> > interfaces?  If so, how high?
> >
> > Since we're only passing a fraction of the traffic this hardware is
> > supposedly capable of, I really suspect this is a software bug.
> >
> >
> > ----------------------------------------------------------------------
> > Jon Lewis                   |  I route
> > Senior Network Engineer     |  therefore you are
> > Atlantic Net                |
> > _________ http://www.lewis.org/~jlewis/pgp for PGP public key_________
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> >
>
>
> --
> "Only two things are infinite, the universe and human stupidity, and
> I'm not sure about the former."
>     - Albert Einstein
>

----------------------------------------------------------------------
 Jon Lewis                   |  I route
 Senior Network Engineer     |  therefore you are
 Atlantic Net                |
_________ http://www.lewis.org/~jlewis/pgp for PGP public key_________