Subject: Re: TOS field removal in OSPF for IPv6

From: "Henderson, Thomas R" <[email-masked]>
Date: Mon, 12 Jan 2004 12:39:12 -0800

> -----Original Message-----
> From: Naidu, Venkata [mailto:[email-masked]]
> Sent: Monday, January 12, 2004 9:21 AM
> To: [email-masked]
> Subject: Re: TOS field removal in OSPF for IPv6
> 
>   Coming to MPLS for IPv4. Yes. There is a similar TOS routing
>   in MPLS. Look at:
>   
> http://www.ietf.org/internet-drafts/draft-ietf-tewg-te-metric-
> igp-02.txt
>   The difference are very subtle and indirect. But, IPv4 TOS
>   routing and MPLS routing with different IGP metrics are one
>   and the same.

The approach cited above works for at most two TOS-based metrics.  
However, there doesn't appear to be a more general OSPFv3 mechanism 
for assigning different metrics to different traffic classes, to 
effect policy routing based on service classes (the problem that 
started this thread).

Tom