RE: QoS Question

From: Lars Christensen (perseusdk@gmail.com)
Date: Tue Apr 15 2008 - 06:50:37 ART


Hi Tarun

Since you set your port as an access port (switchport mode access), you
don't need to match on Vlan 54. Actually you can just use the following:

Policy-map SET_PREC_VLAN_B
 Class class-default
   Set precedence 3
!
interface FastEthernet0/5
 switchport mode access
 service-policy input SET_PREC_VLAN_B

Or you can do it with the following:

interface FastEthernet0/5
 switchport mode access
 mls qos cos 3
 mls qos cos override
!

http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/1
2.2_44_se/command/reference/cli1.html#wp1862788

Regards,
Lars Christensen, CCIE #20292

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Tarun
Sent: 15. april 2008 09:06
To: Cisco certification
Subject: QoS Question

Simple question ( Or may be) :-)

I want to mark all the incoming traffic for a particular vlan on my
switchport with a precedence of 3.

I think I would use per pot per vlan classification for this which is as
follows (assuming port f0/5, vlan 54)

 Class-map match-any DUMMY
 Class Map match-all PER_PORT_PER_VLAN_CLASS (id 2)
   Match vlan 54
   Match class-map DUMMY
  Policy Map SET_PREC_VLAN_B
    Class PER_PORT_PER_VLAN_CLASS
      set precedence 3
interface FastEthernet0/5
 switchport mode access
 service-policy input SET_PREC_VLAN_B

Is that solution correct, if not what is the mistake & the correct solution.

DOCCD Reference:
http://www.cisco.com/en/US/docs/switches/lan/catalyst3550/software/release/1
2.2_25_seb/configuration/guide/swqos.html#wp1044737

Thanks for your help.

Pass the CCIE in six weeks, Guaranteed!
http://www.certscience.com/CCIE



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