Re: [nsp] Experience with NSE-1 and IOS 12.0S?

From: lf@elemental.net
Date: Mon Mar 19 2001 - 16:58:26 EST


Quoting George Robbins (grr@shandakor.tharsis.com):

> >From what I can see the problem with IP accounting is that the list
> of IP address's isn't optimized (hash, tree, etc) so the more entries,
> the more CPU used in IP input. You can totally screw yourself if
> you specific a large number of entries and get a burst of traffic
> for an IP near the end of the list or not in the list at all.

        It seems that in 12.1 ip accounting is somehow "flow accelerated"
        if you enable "ip flow-cache feature-accelerate" and Netflow:

Router#show ip flow acceleration
  Flow feature acceleration is enabled
    1 active features
    Slot 0: IP Accounting
        Active 139 Attaches 229616899 Detaches 229616760 config changes 64598

        Does anyone know what is done there and what the performance
        implications are?

Cheers,
Lars.

-- 
Lars Fenneberg, lf@elemental.net (private), lf@mcs-cityline.net (work)



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