[cisco-bba] How to reset DSCP/TOS on LNS?

[Tony]

You're welcome.

Slight correction, you would need to use the correct AVPair to apply the policy INBOUND. The one I gave below was for outbound policy. The one to use for inbound is:

cisco-avpair = "ip:sub-qos-policy-in=in-policy-name"

Here is some reading if you wish:
http://www.cisco.com/en/US/docs/ios/12_4t/12_4t2/htipmaaa.html

I'd suggest you try the solution from Arie first. It appears much simpler/easier and so is less likely to cause pain for you if you're not worried about doing it for all users.



regards,
Tony.


--- On Thu, 2/9/10, Andy Saykao <andy.saykao at staff.netspace.net.au> wrote:

From: Andy Saykao <andy.saykao at staff.netspace.net.au>
Subject: RE: [cisco-bba] How to reset DSCP/TOS on LNS?
To: "Tony" <td_miles at yahoo.com>, cisco-bba at puck.nether.net, "Arie Vayner" <ariev at vayner.net>
Received: Thursday, 2 September, 2010, 6:41 PM



 
Many thanks to Tony and Arie...and Jason 
too...
 
Will definitely give it a shot.



From: Tony [mailto:td_miles at yahoo.com] 

Sent: Thursday, 2 September 2010 5:29 PM
To: 
cisco-bba at puck.nether.net; Andy Saykao
Subject: Re: [cisco-bba] How to 
reset DSCP/TOS on LNS?




  
  
    Hi Andy,

You could do it by applying a QoS policy 
      via Cisco-AVPair RADIUS attributes, 
      eg:

ip:sub-qos-policy-out=qos-policy-reset0

You would then 
      have a policy on the 7200 something like this:
!
ip access-list 
      extended match-ip-any
 permit ip any any
!
class-map 
      match-any class-ip-any
 match access-group name 
      match-ip-any
!
policy-map qos-policy-reset0
 class 
      class-ip-any
  set ip dscp 0
!

You might be able to 
      achieve the same without all the class-map stuff by just using 
      "class-default" to match and set that to zero, eg:

policy-map 
      qos-policy-reset0
 class class-default
  set ip dscp 
      0

You would have to test. We have found result vary depending on 
      platform and features and so we use the "longer" way as we know it works 
      more consistently.

Reset the users session and you should be good 
      to go when they next connect.

Results can be seen using the normal 
      "show policy-map" command, eg:

LNS#show policy-map int 
      virtual-access 2053

We are doing this on 7204 running 12.2(33)SRD1 
      without any problems.

If you want to do some actual queuing/shaping 
      then you should look to use a parent shaper to shape to the DSL link speed 
      with a child policy to implement your actual 
      QoS.


regards,
Tony.


--- On Thu, 2/9/10, Andy 
      Saykao <andy.saykao at staff.netspace.net.au> wrote:

      

        
        Hi 
        All,
         
        I'm 
        looking for a way to re-mark customer packets as it enters/hits the LNS. 
        
         
        Eg: cust_1 
        --upload-->> [ LNS ] --download-->> 
        cust_2
         
        - In 
        my example cust_1 and cust_2 are both on the same 
        LNS.
        - cust_1 is uploading a file to 
        cust_2.
        - Is 
        there a way to reset the DSCP/TOS value of packets coming from 
        cust_1?
         
        LNS 
        is a Cisco 7301 running 12.2(31)SB14.
         
        Thanks.
         
        Andy

 



      
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