[nsp] 7500: interaction of dCEF and "ip accounting"

[Gert Doering]

Hi,

could someone point me at some documentation describing the interactions
of dCEF (on a 7500) and "ip accounting out"?

I know that dCEF won't work with "ip accounting" (at least that's what
I've heard, but maybe it *does*, if "netflow feature-accelerate" is
switched on, as netflow *does* work distributed?).  

Anyway, assuming it doesn't work together.

Now we have a 7500 that has "ip accounting out" on *some* interfaces, but
not *all*.  So we can have packets flowing

 VIP with "ip accounting out" -> VIP with "ip accounting out"
 VIP witout "ip accounting o" -> VIP with ...
 VIP with ...                 -> VIP without ...
 VIP without ...              -> VIP without ...

Now which of those paths can be dCEF accelerated, and which paths need
to go to the RSP for "central CEF"?

Naively I'd assume that all paths that have a destination interface
without "ip accounting out" could be dCEF switched on the VIPs, but the
interactions might be more complex...

Current IOS is 12.0(21)S1 on a 7507, RSP4s, VIP2-40 and VIP2-50s (plus an 
old FSIP-8, which cannot do distributed <anything>, of course).  

Eventually the box will move to 12.2(x)S to get IPv6.

thanks!

gert
-- 
USENET is *not* the non-clickable part of WWW!
                                                           //www.muc.de/~gert/
Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de