From: InderpalS@mindscapeit.com
Date: Sun Jan 15 2006 - 08:24:22 GMT-3
Well said Pete but now the point is what is the best practice in terms of
ccie lab? If asked to guarantee 256k bandwidth for a class and physical
interface speed is T1, will it make any difference if bandwidth is not set
on interface?
_____
From: Peter McCreesh [mailto:petermccreesh@gmail.com]
Sent: Sunday, January 15, 2006 3:19 PM
To: InderpalS@mindscapeit.com
Cc: ccielab@groupstudy.com
Subject: Re: Bandwidth on interface
I think it determines what is available from the BW command on the interface
and if this is, say, 64K and you set a policy to apply 128K to a class, it
won't let you as it will give the following error message (if the
class-default is assigned 128k and applied to int s0/1):
I/f Serial0/1 class class-default requested bandwidth 128 (kbps), available
only 48 (kbps)
So the BW needs to be correctly set (or at least set above what you need) as
far as I can see but i am open to correction on this.
Regards,
Pete
On 1/15/06, InderpalS@mindscapeit.com <mailto:InderpalS@mindscapeit.com>
<InderpalS@mindscapeit.com <mailto:InderpalS@mindscapeit.com> > wrote:
I know that default is 75% minus (bandwidth for priority queues) but if
bandwidth value is given in kbps under policy map how does it help router to
set bandwidth value under interface?
_____
From: Peter McCreesh [mailto:petermccreesh@gmail.com
<mailto:petermccreesh@gmail.com> ]
Sent: Sunday, January 15, 2006 2:58 PM
To: InderpalS@mindscapeit.com <mailto:InderpalS@mindscapeit.com>
Cc: ccielab@groupstudy.com <mailto:ccielab@groupstudy.com>
Subject: Re: Bandwidth on interface
Hi Inder,
The fact that by default CBWFQ only uses 75% of available BW, this may
affect the amount you can assign to each class.
Other than that, i'm not sure.
Regards,
Pete
On 1/15/06, InderpalS@mindscapeit.com <mailto:InderpalS@mindscapeit.com> <
InderpalS@mindscapeit.com <mailto:InderpalS@mindscapeit.com> > wrote:
Hi Group,
When using CBWFQ, it is necessary to set interface bandwidth?
Scenario 1---------> I guarantee bandwidth for a class using Bandwidth (
)kbps command in policy map
Policy-map policy1
Class class1
Bandwidth 256
If we still need to set bandwidth on interface then why since we are giving
guaranteed bandwidth value in policy map.
Scenario 2---------> I reserve bandwidth for a class using bandwidth percent
command in policy map
Policy-map policy1
Class class1
Bandwidth percent 25
I understand in this scenario, interface bandwidth needs to be set so that
router can calculate available bandwidth and assign to class.
Any inputs are appreciated!
Regards,
Inder
1/15/2006 10:55:46 AM
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