A Link-Type sub-TLV to Convey the Number of Traffic Engineering Label Switched Paths Signalled with Zero Reserved Bandwidth across a Link
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From: The IESG <email@example.com> To: IETF-Announce <firstname.lastname@example.org> Cc: Internet Architecture Board <email@example.com>, RFC Editor <firstname.lastname@example.org>, mpls mailing list <email@example.com>, mpls chair <firstname.lastname@example.org> Subject: Protocol Action: 'A Link-Type sub-TLV to convey the number of Traffic Engineering Label Switched Paths signalled with zero reserved bandwidth across a link' to Proposed Standard The IESG has approved the following document: - 'A Link-Type sub-TLV to convey the number of Traffic Engineering Label Switched Paths signalled with zero reserved bandwidth across a link ' <draft-ietf-mpls-number-0-bw-te-lsps-13.txt> as a Proposed Standard This document is the product of the Multiprotocol Label Switching Working Group. The IESG contact persons are Ross Callon and David Ward. A URL of this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-mpls-number-0-bw-te-lsps-13.txt
Technical Summary Several Link-type sub-TLVs have been defined for OSPF and IS-IS in the context of Multiprotocol Label Switching (MPLS) Traffic Engineering (TE) in order to advertise some link characteristics such as the available bandwidth, traffic engineering metric, administrative group and so on. By making statistical assumption about the aggregated traffic carried onto a set of TE Label Switched Paths (LSPs) signalled with zero bandwith (referred to as unconstrained TE LSP in this document), and with the knowledge of the number of unconstrained TE LSPs signalled across a link, algorithms can be designed to load balance (existing or newly configured) unconstrained TE LSP across a set of equal cost paths. This requires knowledge of the number of unconstrained TE LSPs signalled across a link. This document specifies a new Link-type Traffic Engineering sub-TLV used to advertise the number of unconstrained TE LSP(s) signalled across a link. Working Group Summary No controversy reported. This document represents the WG consensus as a whole: the WG as a whole understands and agrees with it. The document was also last called in the OSPF and IS-IS working groups (in addition to the MPLS WG and IETF last calls), and updated based on comments received. Document Quality Given the relative simplicity of the draft, and the similarity to existing deployed code (in both routers and ATM switches) the amount of review that has occurred is quite generous. Personnel Loa Andersson is the document shepherd, although reportedly George Swallow has also reviewed it. Ross Callon is the responsible AD.