Re: QoS - Per-Port Per-VLAN question

From: sabrina pittarel (sabri_esame@yahoo.com)
Date: Thu Aug 31 2006 - 00:43:03 ART


Hi,
 these are my 2 cents.
 What they are trying to do, with a question like that, is to see if you know that on the switches (exclusively) a "match vlan" commands exists.
 When they ask you to configure something on a switch, always ask to yourself:
 why on the switch? Most likely they are looking for a specific command that you cannot do anywhere else.
 
 Sabrina
 

----- Original Message ----
From: storage4mail <storage4mail@googlemail.com>
To: ccielab@groupstudy.com
Sent: Wednesday, August 30, 2006 1:01:09 PM
Subject: QoS - Per-Port Per-VLAN question

Here's a scenario for which I'd like your input on two given configurations
below (as to what's the difference),

Scenario:

Incoming traffic from a certain interface (y) in a switch that is assigned
to specific VLAN(x) needs to be marked with immediate precedence.

Config. 1:

ip cef

class-map CLASS1
    match access-group name VLANx

policy-map PM
    class CLASS1
        set ip precedence immediate

interface y
    service-policy input PM

ip access-list standard VLANx
    permit <VLANx prefix with inverse mask>

Config. 2:

ip cef

class-map CLASS1
    match access-group 1

class-map CLASS2
    match vlan x
    match class-map CLASS1

policy-map PM
    class CLASS2
        set ip precedence immediate

int y
    service-policy input PM



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