[mpls] Generic Connection Admission Control (GCAC) Algorithm Specification for IP/MPLS Networks

Hi,

Adrian has suggested that the RTGWG and the MPLS WG review the draft "Generic Connection Admission Control (GCAC) Algorithm Specification for IP/MPLS Networks", available at  http://www.ietf.org/id/draft-ash-gcac-algorithm-spec-00.txt (abstract below).

The underlying goal of the work is to specify an optional GCAC algorithm for IP/MPLS networks, to be adopted and implemented by vendors and service providers, that interoperates between vendor equipment and across multiple service provider domains.  This would be analogous to the PNNI GCAC that was widely adopted and helped promote interoperability of ATM networks.  In addition, the approach:
o is based on CSPF, widely implemented by vendors
o does NOT include aspects of CAC that might be considered vendor proprietary implementations, such as detailed path selection mechanisms
o relies on available standard mechanisms for MPLS based networks, such as RSVP, DSTE, PCE...

Comments appreciated.

Thanks,
Jerry

From: Internet-Drafts@ietf.org 
To: i-d-announce@ietf.org 
Reply-to: Internet-Drafts@ietf.org 
Subject: I-D ACTION:draft-ash-gcac-algorithm-spec-00.txt 
X-RSN: 1/0/935/34473/37870 

A New Internet-Draft is available from the on-line Internet-Drafts  
directories.

Title : Generic Connection Admission Control (GCAC) Algorithm Specification for IP/MPLS Networks 
Author(s) : G. Ash, D. McDysan 
Filename : draft-ash-gcac-algorithm-spec-00.txt 
Pages : 23 
Date : 2011-1-11 

This document presents a generic connection admission control (GCAC) 
reference model and algorithm for IP/MPLS-based networks. Service 
provider (SP) IP/MPLS networks need an MPLS GCAC mechanism, for 
example, to reject voice over Internet Protocol (VoIP) calls when 
additional calls would adversely affect calls already in progress. 

Without MPLS GCAC, connections on congested links will suffer 
degraded quality. The MPLS GCAC algorithm can be optionally 
implemented in vendor equipment and deployed by service providers. 
MPLS GCAC interoperates between vendor equipment and across multiple 
service provider domains. The MPLS GCAC algorithm uses available 
standard mechanisms for MPLS based networks, such as RSVP, DSTE, PCE, 
NSIS, DiffServ, and OSPF. The MPLS GCAC algorithm does not include 
aspects of CAC that might be considered vendor proprietary 
implementations, such as detailed path selection mechanisms. MPLS 
GCAC functions are implemented in a distributed manner to deliver the 
objective QoS for specified QoS constraints. The source is able to 
compute a source route with high likelihood that MPLS GCAC via 
elements along the selected path will in fact admit the request. 
MPLS GCAC is applicable to any service or flow that must meet an 
objective QoS (delay, jitter, packet loss rate) for a specified 
quantity of traffic. 

A URL for this Internet-Draft is: 
http://www.ietf.org/internet-drafts/draft-ash-gcac-algorithm-spec-00.txt

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