Tom,
Tom Herbert wrote on 22/02/2021 16:29:
then the obvious question is what exactly is too long. Since this
draft is discussing real implementation and not theory, it seems like
measuring the extent and determining the real operational parameters
of the problems, like what a useful minimum length of header chains
is, seems straightforward either by experimentation or simply polling
router vendors to see what they support.
This issue has already been addressed by Rob Wilton in his AD review:
https://mailarchive.ietf.org/arch/msg/v6ops/iqtpqSIRolTWMbMVIpm-gcoo8qM/
The review is valid. Behaviour of this form is dependent on just about
everything from the router model, to the line card model, to the ASIC /
NPU deployed, to the firmware or software version running on the
forwarding device. A general description is adequate for the purposes
of this draft.
Nick
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