[c-nsp] Traffic destined to IPs that are null routed, Netflow, and you!

Sven Huster sven at huster.me.uk
Fri Mar 12 12:37:51 EST 2010


On 12 Mar 2010, at 16:12, Dobbins, Roland wrote:

> 
> On Mar 12, 2010, at 11:08 PM, Sven Huster wrote:
> 
>> At least for E3 line cards you don't seems to see the drops in NetFlow exports
> 
> Actually, E3 NetFlow telemetry does in fact show dropped traffic with a destination ifindex of 0, as with E5 LCs.

Interesting that you say that given that last time round I saw 600Mbps drop off of ingress on a E3 GE port in my NetFlow data once the dst had been blackholed, while both SNMP stats of the port and 7600 NetFlow on different ingress points behaved as expected.

--
Sven



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