Subject: RE: Independence of signalling and data path (was RE: [NSIS] Two kindsof requirements)

From: "Georgios Karagiannis (ELN)" <[email-masked]>
Date: Mon, 28 Jan 2002 15:01:41 +0100

Hi Dan

Please note that these signaling messages are 
QoS signaling messages. 
If the QoS signaling messages will 
signal QoS information to an edge node, and the user 
data packets (associated to this QoS information)
will not pass through the same edge node, then 
the sent QoS information is useless. 

Please note that existing QoS protocols, e.g., 
RSVPv1 works in the same way, i.e.,the RSVP PATH messages
and user data packets that have the same flow ID are using 
the same communication path.

In my opinion your remark is referring to other types of 
signaling protocols.

Best regards,
Georgios

-----Original Message-----
From: Romascanu, Dan (Dan) [mailto:[email-masked]]
Sent: maandag 28 januari 2002 14:50
To: Georgios Karagiannis (ELN); [email-masked]
Cc: [email-masked]
Subject: RE: Independence of signalling and data path (was RE: [NSIS]
Two kindsof requirements)

> Thus, in GENERAL the path followed by signaling 
> messages and the path followed by user data packets (associated
> to these signaling messages) MUST BE THE SAME!!
> 
> 
Interestingly enough, I am right now involved in a thread in a different
standards group, where customers (service providers) argue strongly that
any control plane protocol should not consume bandwidth at the expense
of the customer traffic. Their argument is that it is not possible to
provide a coherent set of deterministic services if an non-deterministic
amount of the customer bandwidth is consumed by the control plane.

Regards,

Dan

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