Subject: I-D ACTION:draft-ash-itu-sg2-routing-guidelines-00.txt

From: [email-masked]
Date: Tue, 26 Oct 1999 07:23:18 -0400

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

	Title		: Routing Guidelines for Efficient Routing Methods
	Author(s)	: G. Ash
	Filename	: draft-ash-itu-sg2-routing-guidelines-00.txt
	Pages		: 18
	Date		: 22-Oct-99
	
This draft presents the ongoing work in ITU-T SG2 Question 2/2 on
Recommendation E.352 'Routing Guidelines for Efficient Routing Methods.'
Routing policies typically used in ATM- and IP-based networks do not fully consider the possible instabilities and drastic loss of throughput that can occur under congestion.  Use of bandwidth reservation and avoidance of long paths are recommended under such congestion, which can lead to more efficient use of network resources.  Also, there is an emphasis in ATM- and IP-based networks on the use of state-dependent-routing (SDR) methods.
However, the flooding methods typically used by these SDR methods to
disseminate network status information can lead to inefficient use of
network resources. Use of event-dependent-routing (EDR) methods and/or more efficient dissemination of network status information are recommended as other possible approaches to consider.  Finally, QoS routing rules are recommended to ensure service performance quality, such as avoidance of excessive transfer delay by limiting the number of satellite hops in an end-to-end connection.

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