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RE: RSVP in real world practice posted 02/14/2007
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	For MPLS Traffic Engineering yes.  For end-user applications
like VoIP not as much.  The problem with the integrated services QoS
model is that as the network grows the amount of state information that
the devices in the transit path need to maintain can quickly grow out of
control.  Also RSVP is used just to perform reservations in the control
plane of the network, not the data plane.  This means that if an end
application requests a 128Kbps guarantee from the network and it is
granted you still need some type of diffserv application (ie MQC QoS) to
enforce the reservation.


Brian McGahan, CCIE #8593 (R&S/SP)

Internetwork Expert, Inc.
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-----Original Message-----
From: nobody@xxxxxxxxxxxxxx [mailto:nobody@xxxxxxxxxxxxxx] On Behalf Of
Joe Chang
Sent: Wednesday, February 14, 2007 7:13 AM
To: ccielab@xxxxxxxxxxxxxx
Subject: RSVP in real world practice

Given the scaling difficulties of RSVP, has anyone actually seen it
applied in
a production network?


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