INTERNET-DRAFT Linda Dunbar
Intended Status: Informational Donald Eastlake
Huawei
Radia Perlman
Intel
Igor Gashinsky
Yahoo
Expires: October 24, 2012 April 25, 2013
TRILL (Transparent Interconnection of Lots of Links):
Edge Directory Assistance Framework
<draft-ietf-trill-directory-framework-05.txt>
Abstract
Edge TRILL (Transparent Interconnection of Lots of Links) switches
currently learn the mapping between MAC addresses and their egress
TRILL switch by observing the data packets they ingress or egress or
by the TRILL ESADI (End Station Address Distribution Information)
protocol. When an ingress TRILL switch receives a data frame whose
destination address (MAC&VLAN) that switch does not know, the data
frame is flooded within the frame's VLAN across the TRILL campus.
This document describes the framework for using directory services to
assist edge RBridges in reducing multi-destination frames,
particularly unknown unicast frames flooding, and ARP/ND, thus
improving TRILL network scalability.
Status of This Memo
This Internet-Draft is submitted to IETF in full conformance with the
provisions of BCP 78 and BCP 79.
Distribution of this document is unlimited. Comments should be sent
to the TRILL working group mailing list.
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L. Dunbar, et al [Page 1]
INTERNET-DRAFT TRILL: Directory Assist Framework
The list of current Internet-Drafts can be accessed at
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L. Dunbar, et al [Page 2]
INTERNET-DRAFT TRILL: Directory Assist Framework
Table of Contents
1. Introduction............................................4
2. Terminology.............................................5
3. Impact of Massive Number of End Stations................6
3.1 Issues of Flooding Based Learning in Data Centers......6
3.2 Two Examples...........................................7
4. Benefits of Directory Assisted Edge RBridge.............8
5. Generic operation of Directory Assistance..............10
5.1 Information in Directory for Edge RBridges............10
5.2 Push Model and Requirements...........................10
5.3 Pull Model and Requirements...........................12
6. Recommendation.........................................14
7. Security Considerations................................14
8. IANA Considerations....................................14
9. Acknowledgements.......................................14
10. References............................................15
10.1 Normative References.................................15
10.2 Informative References...............................15
Authors' Addresses........................................16
L. Dunbar, et al [Page 3]
INTERNET-DRAFT TRILL: Directory Assist Framework
1. Introduction
Edge TRILL (Transparent Interconnection of Lots of Links) switches
(devices implementing [RFC6325], also known as RBridges) currently
learn the mapping between destination MAC addresses and their egress
TRILL switch by observing data packets or by the ESADI (End Station
Address Distribution Information) protocol. When an ingress RBridge
receives a data frame for a destination address (MAC&VLAN) that
RBridge does not know, the data frame is flooded within that VLAN
across the TRILL campus.
This document describes a framework for using directory services to
datatracker.ietf.org