TRILL Working Group Radia Perlman
INTERNET-DRAFT Intel Labs
Intended status: Proposed Standard Anil Rijhsinghani
HP Networking
Donald Eastlake
Huawei
Ayan Banerjee
Dinesh Dutt
Cumulus Networks
Expires June 30, 2013 January 1, 2013
TRILL: Campus VLAN and Priority Regions
<draft-ietf-trill-rbridge-vlan-mapping-08.txt>
Abstract
Within a TRILL campus, the VLAN and priority of TRILL encapsulated
frames is preserved. However, in some cases it may be desired that
data VLAN and/or priority be mapped at the boundary between regions
of such a campus. This document describes an optional RBridge feature
to provide this function.
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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R. Perlman, et al. [Page 1]
INTERNET-DRAFT TRILL: VLAN and Priority Regions
Table of Contents
1. Introduction............................................3
1.1 TRILL Campus Regions...................................4
1.2 Terminology............................................5
2. Internal and Cut Set Configuration and Mappings.........6
2.1 Multiple Crossings.....................................7
2.2 Native Frame Considerations............................8
2.3 More than Two Regions..................................8
2.4 Mapping Implementation.................................9
3. End Node Address Learning Between Regions..............11
4. Cut Set Attraction of VLANs and Multicast..............12
5. Advertisement of VLAN and Priority Mappings............13
6. IANA Considerations....................................13
7. Security Considerations................................13
8. Normative References...................................14
9. Informative References.................................14
Appendix Z: Change Summary................................15
R. Perlman, et al. [Page 2]
INTERNET-DRAFT TRILL: VLAN and Priority Regions
1. Introduction
The IETF TRILL protocol provides transparent forwarding, with a
number of additional features, by use of link state routing and
encapsulation with a hop count as specified in [RFC6325].
Devices implementing the TRILL protocol are called TRILL switches or
RBridges (Routing Bridges). A TRILL campus is an area of TRILL
switches and possibly bridges bounded by and interconnecting end
stations and Layer 3 routers, analogous to a customer bridge LAN
(which is an area of bridges interconnecting end stations, routers,
and TRILL switches). In a TRILL campus, native frames (as defined in
[RFC6325]), when they arrive at their first or ingress RBridge, are
encapsulated, routed in encapsulated form via zero or more transit
RBridges, and finally decapsulated and delivered by their egress
RBridge or RBridges.
TRILL switch ports have some features specified in IEEE 802.1Q as
described in [RFC6325], with TRILL being implemented above those
ports. Such ports provide for the association of incoming frames with
a particular frame priority and customer VLAN. (See Appendix D of
[RFC6325].)
Bridge ports can map frame priorities, a process called "priority
regeneration" in IEEE 802.1. In addition, some bridge products
datatracker.ietf.org