Subject: RE: Diff serv over MPLS

From: Shahram Davari <[email-masked]>
Date: Mon, 19 Mar 2001 18:18:06 -0800

Hi Francis,

The reason was that the AF required a minimum of two drop priority treatment, and that people wanted to be able to find whether a packet is green or yellow/red just by looking at 2nd bit. Please check the archived emails for details.

Yours,
-Shahram

> -----Original Message-----
> From: Francis Arts [mailto:[email-masked]]
> Sent: Friday, March 16, 2001 12:11 PM
> To: [email-masked]
> Subject: Diff serv over MPLS
> 
> 
> 
> Hello Francois, Liwen, ...,
> 
> I have a question concerning the latest version of the 'diff serv over
> MPLS' draft. For L-LSPs the drop precedence is encoded in the 
> exp bits.
> Compared to version 7 of the draft the encoding of the color 'red' has
> changed from 01 to 11.
> 
> Why was this encoding changed?
> 
> [If changing the encoding of the drop precedence would be 
> done, I would
> have expected that the encoding of ALL  (...) drop precedence values
> would have changed to align with the recommended DSCPs for the AF PHB:
> * 01 = green.
> * 10 = yellow.
> * 11 = red.]
> 
> Kind regards,
> 
>     Francis.
>