TRILL Distributed Layer 3 Gateway
draft-ietf-trill-irb-00
TRILL Working Group W. Hao
INTERNET-DRAFT Y. Li
Intended Status: Standard Track Huawei Technologies
A. Qu
MediaTec
M. Durrani
Brocade
P. Sivamurugan
IP Infusion
L. Xia
Huawei Technologies
Expires: May 14, 2015 November 10, 2014
TRILL Distributed Layer 3 Gateway
draft-ietf-trill-irb-00.txt
Abstract
Currently TRILL protocol provides optimal pair-wise data frame
forwarding for layer 2 intra-subnet traffic but not for layer 3
inter-subnet traffic. A centralized gateway solution is typically
used for layer 3 inter-subnet traffic forwarding but has following
issues:
1. Sub-optimum forwarding path for inter-subnet traffic.
2. Huge number of gateway interfaces, 16 million in extreme case,
need to be supported on the centralized gateway.
3. Traffic bottleneck at the gateway.
An optional TRILL distributed gateway solution that resolves these
centralized gateway issues is specified in this document.
Status of this Memo
This Internet-Draft is submitted to IETF in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that
other groups may also distribute working documents as
Internet-Drafts.
Internet-Drafts are draft documents valid for a maximum of six months
Hao & Li, et al [Page 1]
INTERNET DRAFT TRILL Distributed Layer 3 Gateway November 2014
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
The list of current Internet-Drafts can be accessed at
http://www.ietf.org/1id-abstracts.html
The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html
Copyright and License Notice
Copyright (c) 2013 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Conventions Used in This Document . . . . . . . . . . . . . . . 4
3 Problem Statement . . . . . . . . . . . . . . . . . . . . . . . 5
4 Layer 3 Traffic Forwarding Model . . . . . . . . . . . . . . . . 6
5 Distributed Gateway Solution Overview . . . . . . . . . . . . . 7
5.1. Local routing information . . . . . . . . . . . . . . . . . 8
5.2. Local routing information synchronization . . . . . . . . . 9
5.3. Data traffic forwarding process . . . . . . . . . . . . . . 10
6 Distributed Layer 3 Gateway Process Example . . . . . . . . . . 10
6.1. Control plane process . . . . . . . . . . . . . . . . . . . 11
6.2. Data plane process . . . . . . . . . . . . . . . . . . . . 12
7 TRILL Protocol Extensions . . . . . . . . . . . . . . . . . . . 13
7.1. The tenant gateway MAC APPsub-TLV . . . . . . . . . . . . . 14
7.2. The tenant Label APPsub-TLV . . . . . . . . . . . . . . . . 14
7.3. The IPv4 Prefix APPsub-TLV . . . . . . . . . . . . . . . . 15
7.4. The IPv6 Prefix APPsub-TLV . . . . . . . . . . . . . . . . 16
8 Security Considerations . . . . . . . . . . . . . . . . . . . . 16
9 IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 17
Hao & Li, et al [Page 2]
INTERNET DRAFT TRILL Distributed Layer 3 Gateway November 2014
10 Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 17
Show full document text