Technical Summary
TRILL provides optimum routing for layer 2 traffic. A centralized
gateway solution is typically used for layer 3 inter-subnet traffic
forwarding in a TRILL campus but has the following issues:
1. Sub-optimum forwarding paths for inter-subnet traffic.
2. A centralized gateway may need to support a very large number of
gateway interfaces in a data center, one per tenant per data
label used by that tenant, to provide interconnect functionality
for all the layer 2 virtual networks in a TRILL campus.
3. A traffic bottleneck at the gateway.
This document specifies an optional TRILL distributed gateway solution
that resolves these centralized gateway issues.
Working Group Summary
There has been good support from the working group to advance this
work. There have been no changes in the concept or basic
architecture since it was adopted as a WG draft.
This document isn't strictly in the charter, but there was support and
it is a useful idea. I asked the IESG about a year ago, when I was consulted
and read it, whether it was better to progress as an AD-sponsored draft or
as a WG draft and there was agreement for it to go as a WG draft with the
associated review.
Document Quality
This document is of high quality. It has received numerous reviews
including the RTG DIR QA review here:
http://www.ietf.org/mail-archive/web/trill/current/msg07133.html
Implementations are planned by IPinfusion and Huawei.
Personnel
Document Shepherd: Donald Eastlake
Responsible Area Director: Alia Atlas
WG Chairs: Jon Hudson, Sue Hares