From: Chuck Church (ccie8776@rochester.rr.com)
Date: Thu Dec 12 2002 - 16:25:22 GMT-3
Luis,
My understanding is that they use a 64 byte packet to test PPS. They do
that so that the amount of data the device can possibly move (backplane) is
not the limiting factor in how fast it can switch a frame from interface to
interface. A far as the switching goes, it's just as much work to switch a
64 byte frame as it is to switch one at full MTU. Unless there's an ACL on
the interface, the router would never look at any layer 4 info, so UDP or
TCP wouldn't matter, performance should be the same. It just looks at the
ethertype, then the layer 3 destination. Could even be IPX or AppleTalk. I
know many platforms can fast-switch IPX. Keep in mind that most routers
have a max PPS for both fast switched and process switched. If there's any
TAC people on this list, they might have a little more detailed info.
Chuck Church
CCIE #8776, MCNE, MCSE
----- Original Message -----
From: "Luis Miguel Gil" <lmgil@intecno.net>
To: <ccielab@groupstudy.com>
Sent: Thursday, December 12, 2002 1:38 PM
Subject: OT: easy question about performance
> when cisco or another vendor say: "Performance: 15 kpps", how big is he
> packet ? It is a TCP packect ? It is an UDP packet ? Is a layer 4, layer
3,
> layer 2 packet ????
>
> thanks in advance,
> Luis Miguel.
> .
.
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