Tom,
On Nov 2, 2012, at 2:05 PM, t.p. <daedulus(_at_)btconnect(_dot_)com> wrote:
I worry about the allocation of sub-TLVs in this I-D.
Thanks for the comments. I share worries about keeping synchronicity between
sub-registries in this fashion.
It calls for
"The following Sub-TLV changes, which comprise three updates and two
additions, are made for two TLV Types in the aforementioned sub-
registry: TLV Type 1 for "Target FEC Stack", and TLV Type 21 for
"Reply Path"."
and it is the Type 21 that worries me.
Right -- the allocations under Type 1 are straightforward. But the allocations
under Type 21 seem to be standing over quicksand.
IANA has, for Type 21,
Reply Path (TEMPORARY - expires 2012-01-20)
[draft-ietf-mpls-return-path-specified-lsp-ping]
and I am unclear what the rules are about updates to expired, TEMPORARY,
allocations.
I worry too that
[draft-ietf-mpls-return-path-specified-lsp-ping]
while confirming the reservation of Type 21 takes a different tack for
sub-TLVs, namely
"
According to the guidelines defined in [RFC5226], the sub-TLV range
of Reply Path TLV are partitioned as following:
0-31743 - Reserved, and MUST NOT be allocated."
so quite what this I-D will do to that I-D worries me.
Perhaps the best approach is to decouple. Have all Type 21 allocations under
draft-ietf-mpls-return-path-specified-lsp-ping and have that point to the RFC
from draft-ietf-mpls-ipv6-pw-lsp-ping if needed (and it can take a snapshot of
the sub-registry when it will be stable.)
Thanks,
-- Carlos.
And I worry yet more that other I-Ds, such as
draft-zjns-mpls-lsp-ping-relay-reply-00
are heading down the track with further updates in this area of the MPLS
namespace (except that this particular one seems to have abandoned
sub-TLVs).
Tom Petch
----- Original Message -----
From: "The IESG" <iesg-secretary(_at_)ietf(_dot_)org>
To: "IETF-Announce" <ietf-announce(_at_)ietf(_dot_)org>
Cc: <mpls(_at_)ietf(_dot_)org>
Sent: Wednesday, October 24, 2012 9:31 PM
The IESG has received a request from the Multiprotocol Label Switching
WG
(mpls) to consider the following document:
- 'Label Switched Path (LSP) Ping for IPv6 Pseudowire FECs'
<draft-ietf-mpls-ipv6-pw-lsp-ping-03.txt> as Proposed Standard
The IESG plans to make a decision in the next few weeks, and solicits
final comments on this action. Please send substantive comments to the
ietf(_at_)ietf(_dot_)org mailing lists by 2012-11-09. Exceptionally,
comments may
be
sent to iesg(_at_)ietf(_dot_)org instead. In either case, please retain the
beginning of the Subject line to allow automated sorting.
Abstract
Multi-Protocol Label Switching (MPLS) Label Switched Path (LSP)
Ping
and traceroute mechanisms are commonly used to detect and isolate
data plane failures in all MPLS LSPs including Pseudowire (PW)
LSPs.
The PW LSP Ping and traceroute elements, however, are not specified
for IPv6 address usage.
This document extends the PW LSP Ping and traceroute mechanisms so
they can be used with IPv6 PWs, and updates RFC 4379.
The file can be obtained via
http://datatracker.ietf.org/doc/draft-ietf-mpls-ipv6-pw-lsp-ping/
IESG discussion can be tracked via
http://datatracker.ietf.org/doc/draft-ietf-mpls-ipv6-pw-lsp-ping/ballot/
No IPR declarations have been submitted directly on this I-D.
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