[c-nsp] Control plane policing for BFD

[Pete Lumbis]

Another 7600 quirk.

CSCsg20022 - ACL counters for BFD packets don't increment with CoPP

Sounds like CoPP applies the QoS policy in hardware and the counters you
see in CoPP are based on packets seen outside of CEF in software. Since BFD
is in the CEF path, not the process path, these packets end up bypassing
the process path and don't update the counters.




On Tue, Aug 20, 2013 at 4:51 AM, ibogzipper iboge <ibogzipper at gmail.com>wrote:

> Hi all,
> Does BFD packet hits the control plane? I'm facing one issue one 7600 where
> I can't see the ACL hit count on the control plane .
>     190 permit udp 172.25.33.0 0.0.0.255 172.25.33.0 0.0.0.255 eq 3784
>     200 permit udp 172.25.33.0 0.0.0.255 172.25.33.0 0.0.0.255 eq 3785
>
>  But if the line is missing we are observing the BFD session flap. whether
> ACL counters won't increase if the ACL treated in LC ? or am i missing
> anything
>
> Regards,
> ibog.
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