A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : VLAN based Tree Selection for Multi-destination Frames
Author(s) : Yizhou Li
Weiguo Hao
Radia Perlman
Naveen Nimmu
Somnath Chatterjee
Sunny Rajagopalan
Filename : draft-yizhou-trill-tree-selection-02.txt
Pages : 17
Date : 2013-01-14
Abstract:
TRILL uses the distribution trees to deliver multi-destination frames.
Multiple trees can be used by an ingress RBridge for different flow
based on VLAN and/or multicast group. Different ingress RBridges may
choose different distribution trees for the same VLAN and/or
multicast group traffic. Distribution trees are normally pruned based
on VLAN.
For any RBridge RBn, if RBn has downstream receivers of VLAN x in a
distribution tree t, there will be an entry of (t, x, port list) in
the multicast forwarding table on RBn. If there are n trees and m
VLANs, the multicast forwarding table size on RBn is typically n*m
entries. The value of m is up to 4096 and n is the total number of
distribution trees in the campus. If fine grained labeling is
implemented or finer granularity filtering such as VLAN plus L2/L3
multicast address is used for pruning, the multicast forwarding table
size further increases dramatically. TRILL multicast forwarding table
size is limited by hardware and L3 multicasting may share the same
table with it in hardware implementations. Therefore multicast table
entry is a precious resource. This document specifies a VLAN based
tree selection mechanism to reduce the TRILL multicast forwarding
table size on RBridge.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-yizhou-trill-tree-selection
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-yizhou-trill-tree-selection-02
A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-yizhou-trill-tree-selection-02
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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