[c-nsp] C65K: Any significant correlation between import filter route-map complexity and BGP Router process utilization?

[Gert Doering]

Hi,

On Sun, Sep 05, 2010 at 01:22:47AM -0400, Sridhar Ayengar wrote:
> I thought the 7200 was software-forwarded, and the 7500 and 12000 used 
> ASICs loaded with the tables to do the forwarding?

The 7500 can use "distributed software-forwarding" - that is, on each
VIP board, a local copy of IOS runs on the local CPU and software-forwards
between its local PAs and (via the CyBus) to other VIPs.  No fast ASICs
involved though.  (Don't forget that the 7500 is actually an *older* 
design than the 7200).

On the 12000, it very much depends on the line cards used - the engine 0
cards use "local CPU software forwarding", and the later generations have
forwarding ASICs.

gert
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Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
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