[cisco-bba] CoS PPPoE problem

[Andrew Snowdon]

Hi,

 

This is my first post so forgive me if it’s in the wrong place. 

 

I am having an identical problem to this thread HYPERLINK
"http://gossamer-threads.com/lists/cisco/bba/55782#55782"http://gossamer-thr
eads.com/lists/cisco/bba/55782#55782. I’ve spent weeks trying to find a
solution to this problem and that post is the closest I’ve seen any one
come. For the CoS bit to be set for each PPPoE virtual access interface it
must be done in the virtual template but this is not allowed as the
interface must be a dot1q interface. You cannot use encapsulation dot1Q on a
virtual template so there in lays my problem. I’ve enforced a policy map on
the virtual template that sets the DSCP field of the IP header and it works
fine. This however is of no use to me because we are using PPPoE the extra
PPP header between the mac and IP header blinds all of our network devices
to the DSCP field and makes it useless. The only way for me to possibly get
any type of QoS working on our network will be to use the 802.1p CoS field
which is further down the stack. The last post to the thread mentioned above
says it works with a newer IOS (I’m running 12.2(16)on a 7301). Is that
true? I’m not sure as there are no follow ups. I’m beginning to think that
what I want to do is impossible. Surly I’m not the only person to have this
problem as PPPoE is a proven technology and used by millions of people every
day and I’m sure I’m not the first person ever to try and enforce QoS on a
PPPoE network. Any input at all any one has would be of great help and be
much appreciated.

 

Kindest Regards,

 

Andrew


Internal Virus Database is out-of-date.
Checked by AVG. 
Version: 7.5.519 / Virus Database: 270.7.0/1679 - Release Date: 18/09/2008
17:03
 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://puck.nether.net/pipermail/cisco-bba/attachments/20081009/2a5e77dd/attachment.html>