(Like many of the most powerfull and capable people in the networking field)
I figure, while the CAM table is working away and the router is left to do
"more important" functions, the router must be taking 2 1/2 hour lunches,
joking around in meetings with prospective clients, and doing side jobs.
>>>Brian
>From: "Bob Vance" <[EMAIL PROTECTED]>
>Reply-To: "Bob Vance" <[EMAIL PROTECTED]>
>To: "CISCO_GroupStudy List \(E-mail\)" <[EMAIL PROTECTED]>
>Subject: RE: But isn't that the routers job???
>Date: Tue, 23 Jan 2001 08:48:08 -0500
>
>LOL.
>You're right, it *is* an interesting way to phrase it.
>
> >"... doing route lookups for every packet that comes in the router."
> >Correct me if I'm wrong but isn't that what a routers supposed to do???
>
>Actually, metaphysically speaking, I'd say, "No!"
>The router's main job is to send the packet to the next hop in the best
>path to the destination. So, "doing route lookups" is not his *job*,
>but if that's what he has to do, then it happens as a by product. If he
>can do his job without a route-table lookup, then so much the better,
>freeing him up to handle other packets that do need a lookup, or
>maintain the route table in a timely manner -- or make that new pot of
>coffee.
>
>Maybe,
> "... the RP is free to use valuable CPU time on more important
> things than doing route-table lookups for packets that don't
> need a lookup; like doing lookups for packets that *do* need
> a lookup :)
> "
>
>
>-------------------------------------------------
>Tks | <mailto:[EMAIL PROTECTED]>
>BV | <mailto:[EMAIL PROTECTED]>
>Sr. Technical Consultant, SBM, A Gates/Arrow Co.
>Vox 770-623-3430 11455 Lakefield Dr.
>Fax 770-623-3429 Duluth, GA 30097-1511
>=================================================
>
>
>
>
>
>-----Original Message-----
>From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
>[EMAIL PROTECTED]
>Sent: Monday, January 22, 2001 11:05 PM
>To: [EMAIL PROTECTED]
>Subject: But isn't that the routers job???
>
>
>Hey Group,
> Me again. I'm reading for my CIT and am at the section where it
>goes
>into detail of the various switching methods in the router (i.e.,
>silicon,
>CEF, autonomous, etc.) I understand how all this works and understand
>how the
>SP takes a lot of the stress away from the RP and this is good because
>your
>avoiding bogging the RP/CPU down. I have a problem with these statements
>though and want some clarification...
>
>Taken form the book (Lammle's CIT p. 173):
>
> "This is just another reason why switching is such a good practice.
>Why
>burden the RP with every packet if it's not necessary? By using
>switching
>methods, the RP is free to use valuable CPU time on more important
>things
>than doing route lookups for every packet that comes in the router."
>
>Correct me if I'm wrong but isn't that what a routers supposed to do???
>What
>else does the RP have to do that is more important than ROUTING? I may
>be
>overanalyzing this but it just seems that he's saying that the RP has
>better
>things to do like make coffee, rather than route.
>
>Basically, could somebody give me a list of some other things the RP/CPU
>has
>to do other than route lookups...(I know there are access-lists and
>other CPU
>things here, I just would like a solid list to remember). Thanks team,
>
>Mark Zabludovsky ~ CCNA, CCDA, 3/4-NP
><A HREF="mailto: [EMAIL PROTECTED]">[EMAIL PROTECTED]</A>
>
> "Even if I knew I had only 1 more week to live, I would still
>schedule
>my CCIE lab. I would just have to work a little harder I guess. After
>all,
>without any goals in life, I'm dead already."
> ~Mark
>Zabludovsky~
>
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