From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Thu Jun 10 2004 - 11:17:43 GMT-3
Roi,
Configure the voice traffic in the low latency queue (priority
statement under the class), and do a bandwidth reservation for classes B
and C. Put this class inside another nested policy that shapes out to
2Mbps.
Example:
policy-map RESERVE
class A
priority 500
class B
priority 500
class C
priority 1000
policy-map SHAPE
class class-default
shape average 2000000
service-policy RESERVE
The above configuration gives 500Kbps of low latency to class A,
and guarantees at least 500Kbps and 1000Kbps for class B and class C
respectively in the case of congestion. The congestion condition is
bound by the outer service policy, which is shaping the aggregate of all
classes in RESERVE to 2Mbps. In the case of the absence of traffic for
a particular class, one or more of the other classes may use the
bandwidth allocated to the missing class.
HTH,
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987 x 705
Outside US: 775-826-4344 x 705
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> roih@012.net.il
> Sent: Thursday, June 10, 2004 5:28 AM
> To: ccielab@groupstudy.com
> Subject: CBWFQ in the real life
>
> hi group.
>
> I need help in CBWFQ case in the real world.
> here it goes:
>
>
> 3 classes A,B,C the first is voice.
>
> I have fast Ethernet interface and I need the limit it to 2M
(that's
> what
> the
> customer wants to pay).
> in 2M I have the police the traffic the A and B will get
> 0.5M each and C the other 1M.
> Now for the problem: I want to be able the allocate the BW of class A
if
> no
> packets of voice are arriving and use it
> in class B, the same case from B to C.
> So, my config file have to give me the option to use the entire BW
even if
> A
> and B are empty. I've tried it in few ways (also with the new
feature
> "two-
> rate
> policer" but no success.
> The BW remaining commands cant help here because it define the way the
> Allocate the left BW after the classes used the BW. My challenge is to
> "leak"
> BW from class to class and not from the remaining "bank" to the
classes
>
>
> Experts, Any idea??
>
> p.s the version can be 12.3...
>
> Roi
>
>
This archive was generated by hypermail 2.1.4 : Sat Jul 03 2004 - 19:40:37 GMT-3