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
Somnath Chatterjee
Filename : draft-yizhou-trill-tree-selection-00.txt
Pages : 13
Date : 2012-03-05
TRILL uses distribution trees for multi-destination traffic. In fat
tree structure, it is very possible that the distance from an ingress
RBridge to multiple tree roots are the same. Therefore the minimum
distance comparison may not help much in the tree selection decision.
Multiple trees can be used by an ingress RBridge. 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 up to 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 in hardware/silicon implements and sometimes L3
multicasting shares the same table with it. This document specifies a
VLAN based tree selection mechanism to reduce the multicast
forwarding table size. No data plane change is required.
A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-yizhou-trill-tree-selection-00.txt
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
This Internet-Draft can be retrieved at:
ftp://ftp.ietf.org/internet-drafts/draft-yizhou-trill-tree-selection-00.txt
_______________________________________________
I-D-Announce mailing list
I-D-Announce@ietf.org
https://www.ietf.org/mailman/listinfo/i-d-announce
Internet-Draft directories: http://www.ietf.org/shadow.html
or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
