I-D ACTION:draft-ash-qos-routing-00.txt
Internet-Drafts@ietf.org Wed, 03 March 1999 05:55 UTC
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Subject: I-D ACTION:draft-ash-qos-routing-00.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories. Title : QoS Resource Management in MPLS-Based Networks Author(s) : G. Ash, B. Jamoussi, Y. Lee, O. Aboul-Magd Filename : draft-ash-qos-routing-00.txt Pages : 12 Date : 01-Mar-99 Efficient QoS resource management is needed for a host of existing and ever-increasing new services. For service performance, flexibility, and reduced cost it is preferable to provide integration of these services on a shared network. Such integration and sharing is facilitated by QoS resource management techniques described in the draft which are applicable to MPLS-based networks. Such QoS resource management techniques are used in PSTNs to standardize service classification, bandwidth allocation, bandwidth protection, and priority routing treatment for all network services. In the draft we illustrate the principles of QoS resource management and describe their application to MPLS-based networks. In the proposed QoS resource management method, bandwidth is allocated in discrete changes to each of three virtual networks (VNs) corresponding to high-priority key services, normal priority services, and best-effort lower priority services. Bandwidth changes in VN bandwidth capacity are determined by edge switch/routers based on an overall aggregated bandwidth demand for VN capacity (not on a per-connection demand basis). Based on the aggregated bandwidth demand, these edge switch/routers make periodic discrete changes in bandwidth allocation, that is, either increase or decrease bandwidth on the constraint-based routing label switched paths (CRLSPs) constituting the VN bandwidth capacity. We propose to add optional parameters in the constraint-based routing label distribution protocol (CRLDP) for QoS resource management. In particular, we propose an optional depth-of-search (DoS) type/length/value (TLV) parameter in the CRLDP label request message to control the bandwidth allocation on individual links in a CRLSP. In addition, we propose an optional modify-TLV parameter in the CRLDP label request message to allow modification of the assigned traffic parameters (such as peak data rate, committed data rate, etc.) of an already existing CRLSP. Finally, we propose a crankback-TLV parameter in the CRLDP notification message to allow an edge switch/router to search out additional alternate CRLSPs when a given CRLSP cannot accommodate a bandwidth request. This draft addresses point-to-point QoS resource management, multipoint QoS resource management is left for future study. A URL for this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ash-qos-routing-00.txt Internet-Drafts are also available by anonymous FTP. Login with the username "anonymous" and a password of your e-mail address. After logging in, type "cd internet-drafts" and then "get draft-ash-qos-routing-00.txt". A list of Internet-Drafts directories can be found in http://www.ietf.org/shadow.html or ftp://ftp.ietf.org/ietf/1shadow-sites.txt Internet-Drafts can also be obtained by e-mail. Send a message to: mailserv@ietf.org. In the body type: "FILE /internet-drafts/draft-ash-qos-routing-00.txt". NOTE: The mail server at ietf.org can return the document in MIME-encoded form by using the "mpack" utility. To use this feature, insert the command "ENCODING mime" before the "FILE" command. To decode the response(s), you will need "munpack" or a MIME-compliant mail reader. Different MIME-compliant mail readers exhibit different behavior, especially when dealing with "multipart" MIME messages (i.e. documents which have been split up into multiple messages), so check your local documentation on how to manipulate these messages. Below is the data which will enable a MIME compliant mail reader implementation to automatically retrieve the ASCII version of the Internet-Draft.
- I-D ACTION:draft-ash-qos-routing-00.txt Internet-Drafts
- I-D ACTION:draft-ash-qos-routing-00.txt Internet-Drafts