[c-nsp] Operational impact of switching from ingress to egress replication mode

[John Neiberger]

Thanks. I've never used the MLS limiters before, so I'll look into how
they're configured in case we decide to use them. But we also have the
option of moving most of our production traffic away from these boxes
temporarily, so we may be able to just deal with the temporary chaos.

John

On Tue, Sep 21, 2010 at 2:04 PM, Benjamin Lovell <belovell at cisco.com> wrote:
> Excellent point and suggestion. This should prevent punts from smashing your control plane and causing a cascading effect like the one I described.
>
> -Ben
>
>
> On Sep 21, 2010, at 3:47 PM, Phil Mayers wrote:
>
>> On 09/21/2010 08:27 PM, Benjamin Lovell wrote:
>>> The primary thing to worry about here is the mcast packet rate not
>>> number of mroutes. Replication change will cause all mcast packets to
>>> be punted to CPU for a short period(few 100 msec or so).
>>
>> Remember you can rate-limit this with the MLS limiters. Whilst they defaults are (very) high, lowering it for the duration of this change could ease the problems.
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