Subject: RE: Draft-Shah-pwe3-PW-QOS-Signalling

From: "Shah, Himanshu" <[email-masked]>
Date: Mon, 19 Apr 2004 10:12:02 -0400

PW signaling per say is independant of underlying 
tunneling technology. Hence the reason for not 
including COS info in the PW QOS TLV in the initial draft.
However, if there is sufficient interest, sub-TLVs exist
for such extensions. Ditto for other params, like setup/hold,
etc.

The goal for PW QOS signaling is to inform other PE about
local AC's QOS constraints. The remote PE may use that 
information only to adjust traffic policing. It may also use
that information to select appropriate traffic engineered
tunnel. How the QOS information is utilized is not manadated.
Hence I don't believe in need for the flag. A PE can always
do "label release" if "TC param not accepted" status is
received from the other side.

regards,
/himanshu

> -----Original Message-----
> From: M. ELK [mailto:[email-masked]]
> Sent: Saturday, April 17, 2004 5:19 AM
> To: [email-masked]
> Subject: [PWE3] Draft-Shash-pwe3-PW-QOS-Signalling
> 
> 
> 
> Hi
> 
> The PW QOS TLV do not signal the COS (Differ serv ) needed 
> for the PW , what 
> are the reason's .
> is the COS will be signaled in the Sub-TLV ??
> 
> For the status code "Can not accept the TC Parameter" sent by 
> the Head-end 
> Node for the PW , why not such node also  indicate  what TC 
> parameters is 
> willing to accept .
> 
> What about setup and hold priorities for the PW to be part of 
> the QOS signal 
> .
> 
> Could we add a flag to indicate that the QOS (TC ..etc ) Parameters 
> need/mandatory to be used in both direction . This will help to :
> 
> configure just one end with the QOS parameter , A Node 
> recieving QOS TLV 
> with this flag set and have no config for QOS parmeter will 
> use same  QOS 
> TLV in the "Learning Label Mapping" msg .
> 
> For 2 node configured with different QOS Parameters , the QOS 
> parametrs TLV 
> with this flag set
> will prevail .
> 
> For 2 node configured with different QOS Parameters and both 
> configured with 
> this flag set ,
> the PW initiation should be aborted .
> 
> l
> 
> Brgds
> 
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