From: Chris Larson (clarson52@comcast.net)
Date: Fri Oct 10 2003 - 15:37:47 GMT-3
Here is my thinking:
If the max reserved bandwidth is 75% and the remainder is for anything not
defined in your class maps then all is good.
However, if you define a default class map that anything not matching your
other classes goes into (ie. everything else) then what is the purpose of
the 25% of bandwidth that was reserved? It is wasted...all other traffic is
going to your defined default class. So what is that leftover 25% going to
be used for then?
If they said ftp 25%, html 25%, smtp 40% and everything else 10% bandwidth
then I think you would create a class default and change the max-reserved
bandwidth to zero. If you didn't all the "other" traffic goes to your
default class and the 25% bandwidth you left reserved goes totally unused
and is basically wasted. The flip side might be that you define the specific
classes excpet for a default class and change max-reserved to 10%.
See what I am getting at.
----- Original Message -----
From: "McClure, Allen" <Allen.McClure@Yum.com>
To: "Chris Larson" <clarson52@comcast.net>; <ccielab@groupstudy.com>
Sent: Friday, October 10, 2003 1:48 PM
Subject: RE: Class Default
> You shouldn't really mess with max-reserved unless you are required to
> IMO.
>
> I think that it's important to realize that the default-class is
> generally used as a "best-effort" dumping ground. With that being the
> case, you certainly want the classes that you took the time and effort
> to define to be allocated bandwidth, policed, or whatever, assuming that
> is the goal. Otherwise, what would be the point in defining non-default
> classes in the first place?
>
> I could be missing the point, let
me know.
>
> Allen G. McClure
> CCNP/CCDP/MCSE
> Yum! Brands, Inc.
> Sr. Network Analyst
> allen.mcclure@yum.com
>
> -----Original Message-----
> From: Chris Larson [mailto:clarson52@comcast.net]
> Sent: Friday, October 10, 2003 12:39 PM
> To: ccielab@groupstudy.com
> Subject: Class Default
>
>
> If we are asked to configure multiple classes for CBWFQ and a class for
> all other traffic ( a default) then wouldn't it be the case that we
> should make max reserved bandwidth 0
>
> Any traffic that does not confirm to the defined classes would go into
> the configure default class and therefore I think you would not want to
> keep any reserved bandwidth on the interface.
>
> It would all go towards the policy that has the configured default
> class?
>
> Is that correct?
>
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