ToS-like processing of the IPv6 Traffic Class?

Mon Sep 27 22:10:31 CEST 2010

On 2010-09-27 21:10, Fernando Gont wrote:
> Hi, Merike,
> 
> Please find my comments inline...
> 
>> Here's two pointers that may help:
>>
>> http://www.juniper.net/techpubs/en_US/junos9.4/topics/concept/cos-ipv6-protocols-overview-solution.html
>>
>> http://www.cisco.com/en/US/docs/ios/ipv6/configuration/guide/ip6-qos.html
>> [especially the troubleshooting part]
> 
> These two pointers are about diffserv (which is *not* what I was looking
> for). I was asking about processing the IPv6 Traffic Class as in the
> original IPv4 ToS definition (e.g., strict precedence-ordered queuing,
> based on the Precedence field of the ToS, etc.)

The Cisco stuff makes it clear (as I said earlier) that precedence
is a subset of diffserv. If someone claims to support diffserv then they
are automatically claiming to support IP precedence. The juniper doc cited
doesn't appear to mention precedence, but the 3rd table at
http://www.juniper.net/techpubs/software/junos/junos80/swconfig80-cos/html/cos-ba-classifiers3.html
make it clear that they do support IP precedence as part of diffserv.
Which is exactly what RFC 2474 requires.

    Brian