From: Roberto Fernandez (rofernandez@us.telefonica.com)
Date: Wed May 17 2006 - 15:47:53 ART
I think it is restricting you to NOT use NBAR, just that. MQC itself
does not requires CEF, not CAR either requires it. (I understand)
Best Regards,
Roberto
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Koen Zeilstra
Sent: Wednesday, May 17, 2006 2:02 PM
To: Daniel Kutchin
Cc: ccielab@groupstudy.com
Subject: Re: CEF and QoS, again
In other words (forget my previous email):
When the QOS task requires you to "not use cef" what options do you have
left?
And what about restricting to use cef for your solution?
grtz,
Koen
-----------------------
unix soit qui mal y pense
On Tue, 16 May 2006, Daniel Kutchin wrote:
| Hi Taylor -
|
| 4) Disable CEF for PPPoFR (i.e. Virtual Templates)
|
| BTW: Always enable CEF in order to use NBAR (In the book according to
Odom
| Chapter p.222)
|
| Daniel
|
| ----- Original Message -----
| From: "Wang, Ting (Taylor)" <wangting@avaya.com>
| To: <ccielab@groupstudy.com>
| Sent: Sunday, May 14, 2006 4:09 AM
| Subject: RE: CEF and QoS, again
|
|
| Hi Group,
| Sorry missed the text in last mail.
| I find some discussion on when CEF need to be enabled for QoS, but
| still not quite sure. From previous discussion, it concludes that CEF
| need to be enabled when you are using NBAR, marking your traffic or
| CAR. Is that correct? For marking, there is several appoach like
police,
| MQC set, PBR, and CAR. In which case the CEF is a must, and in which
| case it is recommended or not required?
| There is another saying "you don't have to enable NBAR to mark traffic
| via protocol (for well-known protocols at least)." " CEF and QoS are
| mutually exclusive." How to understand it? In which case we need to
| disable the CEF for QOS?
| Following are conclusion from some past discussion, any idea on that?
| 1) There are no real reasons that you want to disable CEF unless you
| were running into a bug where's it causing problems.
| 2) Disable CEF when using proxy-arp, 'cause this can cause a routing
| loop
| 3) If you wanted to load-balance by the routing protocol then you
would
| not want cef . The logic being that cef would assume the load
balancing
| functions over the routing protocol once populated.
|
| Thanks,
| Taylor
|
|
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