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
Filename : draft-yizhou-trill-tree-selection-01.txt
Pages : 15
Date : 2012-07-03
Abstract:
TRILL uses distribution trees for multi-destination traffic. Multiple
trees can be used by an ingress RBridge. 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 finer granularity filtering
such as L2/L3 multicast address is used, then 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. No data plane change is required.
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-01
A diff from previous version is available at:
http://tools.ietf.org/rfcdiff?url2=draft-yizhou-trill-tree-selection-01
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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