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) : Gerald Ash
Dave McDysan
Filename : draft-ash-gcac-algorithm-spec-04.txt
Pages : 27
Date : 2012-02-25
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, as
one motivational 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 objective is that 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. In some cases (e.g., multiple
AS) this objective cannot always be met, but the document summarizes
methods that partially meet this objective. 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-04.txt
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
This Internet-Draft can be retrieved at:
ftp://ftp.ietf.org/internet-drafts/draft-ash-gcac-algorithm-spec-04.txt
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