[c-nsp] Sup2T multicast hardware forwarding missing

[Hunter Fuller]

The router should log something like this, actually:

DFC4-4-FIB_EXCEPTION: FIB TCAM exception for IPv4 multicast, Some
routes will be software switched.

--
Hunter Fuller
Router Jockey
VBH Annex B-5
+1 256 824 5331

Office of Information Technology
The University of Alabama in Huntsville
Network Engineering

On Mon, Oct 21, 2019 at 2:53 AM Christian Kratzer <ck-lists at cksoft.de> wrote:
>
> Hi,
>
> On Fri, 18 Oct 2019, Łukasz Bromirski wrote:
> > Christian,
> >
> > What does the 'show mls cef exception status’ say?
> >
> > If you want, send the SR # to my @cisco.com address (lukasz.bromirski) and I’ll
> > look into what’s going on at the TAC end.
>
> summary to the list.
>
> This turned out to be plain old run out of resources
>
>      #show platform hardware cef resource-level
>      Global watermarks: apply to Fib shared area only.
>      Protocol watermarks: apply to protocols with non-default max-routes
>
>      Fib-size: 256k (262144), shared-size: 248k (253952), shared-usage: 234k(239753)
>
>      Global watermarks:
>                          Red_WM: 95%,   Greem_WM: 80%,   Current usage: 94%
>
>      Protocol watermarks:
>
>       Protocol           Red_WM(%)      Green_WM(%)     Current(%)
>       --------           ---------      ----------      ----------
>       IPV4                --             --              30% (of shared)
>       IPV4-MCAST          --             --              0 % (of shared)
>       IPV6                --             --              64% (of shared)
>       IPV6-MCAST          --             --              0 % (of shared)
>       MPLS                --             --              0 % (of shared)
>       EoMPLS              --             --              0 % (of shared)
>       VPLS-IPV4-MCAST     --             --              0 % (of shared)
>       VPLS-IPV6-MCAST     --             --              0 % (of shared)
>
> We just needed a pointer to the right place to look, filterd bgp routes to a minimum and hw forwarding was instantly back.
>
> Neither the gold partner with the support contract nor tac has yet replied with the simple details.
>
> We also searched for ages because we were expecting the router to log something when it runs low on tcam or whatnot hardware resources.
>
> Once again we see that community support seems to run circles around vendor or partner support contracts.
>
> Greetings
> Christian
>
> --
> Christian Kratzer                   CK Software GmbH
> Email:   ck at cksoft.de               Wildberger Weg 24/2
> Phone:   +49 7032 893 997 - 0       D-71126 Gaeufelden
> Fax:     +49 7032 893 997 - 9       HRB 245288, Amtsgericht Stuttgart
> Mobile:  +49 171 1947 843           Geschaeftsfuehrer: Christian Kratzer
> Web:     http://www.cksoft.de/
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