[c-nsp] N77k and IPv6 traffic through SNMP (bug CSCuy92828)

[Tassos Chatzithomaoglou]

Hi Gert,

Gert Doering wrote on 23/2/2018 9:34 πμ:
> Hi,
>
> On Thu, Feb 22, 2018 at 11:48:05PM +0200, Tassos Chatzithomaoglou wrote:
>> Lately we revisited the topic, opened a case and TAC informed us about bug CSCuy92828, where it's clearly written that hw switched IPv6 traffic isn't returned by SNMP (that explains the wrong counters). Bug is still open (as enhancement but with a very low number of support cases), so it gives us  hope that it's not an hw limitation of N77k, but rather a sw one.
> Is N77k using the same EARL as Sup720?  In that case, you're lost - it's
> a hardware limitation that cannot be fixed or workarounded, the chip is
> counting IPv6 transit traffic on the IPv4 counters.
>
> (I ran into this on Sup720 systems, and that's what came back from TAC)
>
> If it's a different forwarding engine, no idea...
>
> gert

Although not 100% sure, i believe SUP2E is using EARL8 like SUP2T.
On the other hand, F3 cards use a SoC design, so i don't know if there
are any relevant differences with M3 (also using EARL8).

--
Tassos