From: Pavel Bykov (slidersv@gmail.com)
Date: Fri Nov 14 2008 - 17:21:38 ARST
It's not going to be that simple. Rule of thumb is to turn them on.
1. On routers always turn ON CEF.
- It came a long way from the days of EARL, and now integrates many
functions, like mpls and DSCP marking.
- Turn it off if you want to debug packets flowing though
theinterface only. I can't think of other reason to turn it off.
2. Turn on MLS QoS on switches if you want QoS functions to become active.
- Default behavior is to leave marking on packets as it was and MLS
QOS is OFF.
- If you turn it on, defaulttrust state is untrusted and therefore
all COS resets to 0
3. Route-cache is command how you control what switching method to use.
- It is an INTERFACE command. Negate it to use process switching.
- subcommand controls the switching method (CEF, FLOW, POLICY
etc...)
Remember, you can control CEF only on routers. If you would like to turn off
CEF on switches, well.... you should get a screwdriver and rip off
ASIC,because that's where CEF is :) Or get an old 5500 /w RSM, there you
could turn it off with command :)
On Fri, Nov 14, 2008 at 6:02 PM, Dimitry <dimokl@gmail.com> wrote:
> Hi group ,
>
>
> Please, can anyone point me to url or just write down clear rules about
> for
> turning on/off (especially off) cef / mls qos / route-cache.
> I mean , when I look through Lab solutions these things often surprise me,
> cause I can't see clear logic behind it.
>
>
> Thanks in advance,
> Dimitry.
>
>
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-- Pavel Bykov ------------------------------------------------- Stop the braindumps! http://www.stopbraindumps.com/Blogs and organic groups at http://www.ccie.net
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