The increasing number of delay and loss critical services in packet networks require differentiated packet handling in the forwarding plane. Quality of Service (QoS)
guarantees can be given for networks using resource reservation and admission control. However, such strategies require complex control plane extensions and might lead to higher operation expenditures.
Network operators therefore often use over-provisioning and
traffic differentiation to offer cheaper Class of Service (CoS)
quality in their internet protocol (IP) packet networks.
The number of differentiated classes and their autonomous
system (AS) internal implementation is at the operator’s choice.
This paper proposes a signalling concept for inter-AS layer
three Class Set signalling, supported classes, their encoding and
packet rate limitations. It makes use of the Border Gateway
Protocol (BGP) as the predominantly used routing protocol for
AS peering communication. The paper specifies two new nontransitive
attributes, which enable adjacent peers to signal Class
of Service capabilities and admission control limitations. The new
"CoS Capability Attribute" and the “CoS Parameter Attribute"
are simple data structures, which signal the classes, their per hop
behaviour (PHB) ID code and the token bucket control
performed at the ingress AS border router for rate limitation
purposes. The denoted Class of Service forwarding support is
meant as the AS externally available (transit) Class of Service
support.
The approach is now work in progress at the IETF.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:19072 |
| Date | 04 February 2009 |
| Creators | Knoll, Thomas Martin |
| Publisher | Technische Universität Chemnitz |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | doc-type:conferenceObject, info:eu-repo/semantics/conferenceObject, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
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