The IESG has approved the following document: - 'TRILL: Data Label based Tree Selection for Multi-destination Data' (draft-ietf-trill-tree-selection-05.txt) as Proposed Standard This document is the product of the Transparent Interconnection of Lots of Links Working Group. The IESG contact persons are Alvaro Retana, Alia Atlas and Deborah Brungard. A URL of this Internet Draft is: https://datatracker.ietf.org/doc/draft-ietf-trill-tree-selection/ Technical Summary TRILL uses distribution trees to deliver multi-destination frames. Multiple trees can be used by an ingress RBridge for flows regardless of the VLAN, Fine Grained Label (FGL), and/or multicast group of the flow. Different ingress RBridges may choose different distribution trees for TRILL Data packets in the same VLAN, FGL, and/or multicast group. To avoid unnecessary link utilization, distribution trees should be pruned based on VLAN and/or FGL and/or multicast destination address. If any VLAN, FGL, or multicast group can be sent on any tree, for typical fast path hardware, the amount of pruning information is multiplied by the number of trees; however, there is a limited capacity for such pruning information. This document specifies an optional facility to restrict the TRILL Data packets sent on particular distribution trees by VLAN, FGL, and/or multicast group thus reducing the total amount of pruning information so that it can more easily be accommodated by fast path hardware. Working Group Summary WG had discussion over 2+ years regarding data label based tree selection for multi-destination data. The working came to a good consensus on this discussion Document Quality No known implementation of this technology. Distribution trees, ECMP, and Fine-Grain Labels (FGL) exist in many implementation, and some proprietary technology has similar features. Personnel Document Shepherd: Susan Hares Responsible AD: Alia Atlas
