Subject: RE: [Diffserv] RFC 2474 & RFC 2475

From: Jay Wang <[email-masked]>
Date: Tue, 15 Aug 2000 15:58:47 -0700

I think the decision should be policy-driven and the related 
policies should be configurable.

- Jay Wang 

> -----Original Message-----
> From: Taner OKUMUS [mailto:[email-masked]]
> Sent: Tuesday, August 15, 2000 3:24 PM
> To: [email-masked]
> Subject: [Diffserv] RFC 2474 & RFC 2475
> 
> 
> I was going over RFCs 2474&2475 and two statements took my attention.
> 
> RFC 2475 section 6.1 says: "Ingress nodes must
>    condition all other inbound traffic to ensure that the DS 
> codepoints
>    are acceptable; packets found to have unacceptable codepoints must
>    either be discarded or must have their DS codepoints modified to
>    acceptable values before being forwarded.  For example, an ingress
>    node receiving traffic from a domain with which no enhanced service
>    agreement exists may reset the DS codepoint to the Default PHB
>    codepoint [DSFIELD].  "
> 
> RFC 2474 section 3 says: "Packets received with an 
> unrecognized codepoint
> SHOULD be forwarded as if they were marked for the Default 
> behavior (see
> Sec. 4), and
>    their codepoints should not be changed.  "
> 
> In case of an unrecognized codepoint which statement is 
> correct? Should we
> modify the codepoint or should we leave it as it is and 
> forward as if it is
> marked as default PHB?
> 
> Any comments?
> 
> 
> Ibrahim Taner OKUMUS
> Syracuse University
> Electrical & Computer Engineering
> http://web.syr.edu/~iokumus
> 
> 
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