Hi Uma,
There was a discussion on this topic. I think this was agreed during Chicago's
IETF if I remember correctly.
The outcome of the discussion was that if an implementation is able to read N
labels, this does not mean that it is actually able to hash based on these N
labels. So we needed something which combines the ability of reading + doing an
action. That's why the ERLD has been defined instead of the base RLD which was
foreseen at first stages of the draft.
This implies that there is a possibility to create additional RLDs that may
have other applications than entropy.
Brgds,
From: Lsr [mailto:lsr-boun...@ietf.org] On Behalf Of Uma Chunduri
Sent: Wednesday, August 28, 2019 20:38
To: lsr@ietf.org
Subject: [Lsr] draft-ietf-isis-mpls-elc-07
Can anybody tell what was the conclusion (if any) in previous discussions in
various WGs on why the readable label depth in an LSR has to be entropy label
specific ?
IOW can we just modify this as "readable label depth" as opposed to "entropy
readable label depth" ?
This would allow any other special purpose label inserted in the stack and
would be at par with current MSD type "Base MPLS Imposition MSD" (
https://www.iana.org/assignments/igp-parameters/igp-parameters.xhtml ).
--
Uma C.
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