From: Chris Lewis (chrlewiscsco@gmail.com)
Date: Sat Jun 03 2006 - 15:54:49 ART
Pierre,
It's a bit difficult to sift through all of the materila in your first post,
I think most of its already discussed. Just a comment on one issue though.
Regards "Would Configuration 4 accomplish the same thing as
configuration 3 ?"
Configuration 3:
==========
policy pop
class main
shape a
service-policy toto
policy toto
class 1
bandwidth y
class 2
bandwidth z
==========
Configuration 4:
==========
policy pop
class main
shape a
class 1
bandwidth y
class 2
bandwidth z
Configuration 3 will shape the main interface to rate a, and bandwidth will
be applied to class 1 and 2 as configured. Configuration 4 will not achieve
the same thing. In a policy-map, the order of clas appearance is
significant. If class main matches all traffic, not traffic will ever fall
dwon out of it to be matched in class 1 or class 2, so the bandwidth
configuration will not have an effect for those classes.
Chris
On 6/3/06, Petr Lapukhov <petrsoft@gmail.com> wrote:
>
> As for subinterface example.
>
> Let's imagine that we have FastEthernet with two vlans: 10 and 20
>
> We want to limit sending rate to every VLAN up to 1Mbs, and provide
> some traffic reservation at the same time. Say give RTP priority, and
> guarantee HTTP 384Kb on every vlan.
>
> We can not directly put CBWFQ at subinterface - subinterface is never
> congested, hence queueing in never activated. So we need to come
> with a little bit more complicated idea.
>
> First, we create CBWFQ strategy:
>
> class-map VOICE
> match protocol rtp
>
> class-map HTTP
> match protocol http
>
> policy-map CBWFQ
> class VOICE
> priority 128
> class HTTP
> bandwith 384
>
> Now, we should shape ALL the subinterface traffic to 1Mbs:
>
> policy-map VLAN10_SHAPE
> class class-default
> shape average 1000000
> service-policy CBWFQ
>
> interface fastethernet 0/0.10
> encapsulation dot1q 10
> ip address 10.10.10.1 255.255.255.0
> service-policy output VLAN10_SHAPE
>
> So now we shape all VLAN10 traffic to 1Mbs, yet give some traffic
> priority treatment.
>
> HTH
> Petr
>
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