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

Phil Mayers p.mayers at imperial.ac.uk
Wed Sep 22 03:31:55 EDT 2010


On 09/22/2010 01:00 AM, Peter Rathlev wrote:
> On Tue, 2010-09-21 at 22:12 +0100, Phil Mayers wrote:
>> 2. Use CoPP for everything else; DO NOT use the glean or cef receive
>> limiter
>
> I'm confused here: Why not use the glean limiter? As I understand it you
> can simplify the CoPP maps a lot. (Non-IP traffic like IS-IS still being
> a special case of course.)
>
> What am I missing? Is it because you want to catch special cases of
> gleaning earlier in the CoPP and differentiate rates?
>

IIRC the glean limiter is faulty in some fashion on PFC-3B and earlier. 
I can never remember the precise details, but I think it's been 
discussed on the list in the past, and I've had knowledgeable TAC 
engineers tell me "really, don't use it".


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