[c-nsp] PIM BiDir on Nexus

[Ge Moua]

Colin, thx for the feedback.

--
Regards,
Ge Moua
Univ of Minn Alumnus
--


On 06/19/2013 06:36 PM, Colin Whittaker wrote:
> This was all M108 and M132 cards.
>
> We were doing both pim bidir and pim-sm.
>
> The fib bugs were rare enough but we had enough scale that even at
> something like 1 in 1000 error rates ment that we saw it frequently.
>
> Thankfully we turned off multicast about 6 months ago so only the
> unicast bugs to deal with.
>
> The FIB bugs all relate to a fundamental defect in the n7k software
> architecture in that the sup never validates that the linecards have
> received the updates sent to the them so I would expect the f2 to have
> similar issues.
> In addition to the multicast issues we have seen unicast fib
> inconsistency and interface mtus not matching.
>
> Colin
>
> On Wed, Jun 19, 2013 at 05:16:32PM -0500, Ge Moua wrote:
>> Colin-
>> Thx for the feedback.  I'm looking at the the F2 cards on nx-7k; are you
>> doing this on the older M-series cards?  Also are you also doing
>> specifically BiDir PIM?  Standard PIM (SM specifically for use-case in
>> question here) seems to work but without some minor hiccups on the newer
>> F2 cards.  Thx again.
>>
>> :-)
>>
>> --
>> Regards,
>> Ge Moua
>> Univ of Minn Alumnus
>> --
>>
>>
>> On 06/19/2013 04:35 PM, Colin Whittaker wrote:
>>> It works pretty well on n7k.
>>>
>>> The multicast code is prone to a class of bugs on the 7k where the fibs
>>> on the line cards get out of sync with the rib/mrib on the sup.
>>>
>>> We had multiple instances of routers blackholing traffic after topology
>>> changes because linecards had missing routes.
>>> reloading the line card would fix it but it was always a bugger to find
>>> the affected cards.
>>>
>>> colin
>>>
>>>
>>> On Wed, Jun 19, 2013 at 12:04:25PM -0500, Ge Moua wrote:
>>>> c-nsp folks:
>>>> Anyone out there looking to do PIM BiDir on Nexus?  There appears to be
>>>> some limitations with PIM BiDir on the nx-7k but the nx-6k may be a
>>>> viable option (albeit the hw arch between the nx-7k&   nx-6k are not
>>>> exactly apples-for-apples).  I'd appreciate opinion/feedback from others
>>>> here.  Thanks in advance.
>>>>
>>>>
>>>> --
>>>> Regards,
>>>> Ge Moua
>>>> Univ of Minn Alumnus
>>>> --
>>>>
>>>>
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