Transparent Interconnection of Lots of Links (TRILL): Adjacency
RFC 7177
| Document | Type |
RFC - Proposed Standard
(May 2014; No errata)
Obsoletes RFC 6327
Updates RFC 6325
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Replaces | draft-eastlake-trill-rfc6327bis | ||
| Stream | IETF | ||
| Formats | plain text pdf htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Jon Hudson | ||
| Shepherd write-up | Show (last changed 2013-10-25) | ||
| IESG | IESG state | RFC 7177 (Proposed Standard) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Ted Lemon | ||
| Send notices to | (None) | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | No IANA Actions | ||
Internet Engineering Task Force (IETF) D. Eastlake 3rd
Request for Comments: 7177 Huawei
Obsoletes: 6327 R. Perlman
Updates: 6325 Intel Labs
Category: Standards Track A. Ghanwani
ISSN: 2070-1721 Dell
H. Yang
Cisco
V. Manral
Ionos Corp.
May 2014
Transparent Interconnection of Lots of Links (TRILL): Adjacency
Abstract
The IETF Transparent Interconnection of Lots of Links (TRILL)
protocol supports arbitrary link technologies between TRILL switches,
including point-to-point links and multi-access Local Area Network
(LAN) links that can have multiple TRILL switches and end stations
attached. TRILL uses Intermediate System to Intermediate System
(IS-IS) routing. This document specifies the establishment,
reporting, and termination of IS-IS adjacencies between TRILL
switches, also known as RBridges (Routing Bridges). It also concerns
four other link-local aspects of TRILL: Designated RBridge (DRB)
selection, MTU (Maximum Transmission Unit) testing, pseudonode
creation, and BFD (Bidirectional Forwarding Detection) session
bootstrapping in connection with adjacency. State diagrams are
included where appropriate. This document obsoletes RFC 6327 and
updates RFC 6325.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc7177.
Eastlake, et al. Standards Track [Page 1]
RFC 7177 TRILL: Adjacency May 2014
Copyright Notice
Copyright (c) 2014 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.
Eastlake, et al. Standards Track [Page 2]
RFC 7177 TRILL: Adjacency May 2014
Table of Contents
1. Introduction ....................................................4
1.1. Content and Precedence .....................................5
1.2. Terminology and Acronyms ...................................5
2. The TRILL Hello Environment and Purposes ........................6
2.1. RBridge Interconnection by Ethernet ........................6
2.2. Handling Native Frames .....................................7
2.3. Zero or Minimal Configuration ..............................8
2.4. MTU Robustness .............................................8
2.5. Purposes of the TRILL Hello Protocol .......................9
3. Adjacency State Machinery ......................................10
3.1. TRILL Hellos, Ports, and VLANs ............................10
3.2. Adjacency Table Entries and States ........................11
3.3. Adjacency and Hello Events ................................12
3.4. Adjacency State Diagram and Table .........................15
3.5. Multiple Parallel Links ...................................17
3.6. Insufficient Space in Adjacency Table .....................17
4. LAN Ports and DRB State ........................................17
4.1. Port Table Entries and DRB Election State .................18
4.2. DRB Election Events .......................................19
4.2.1. DRB Election Details ...............................20
4.2.2. Change in DRB ......................................20
4.2.3. Change in Designated VLAN ..........................21
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