[mpls] Eric Rescorla's Discuss on draft-ietf-mpls-sfc-05: (with DISCUSS and COMMENT)

Datatracker on behalf of Eric Rescorla <noreply@ietf.org> Thu, 07 March 2019 14:08 UTC

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Date: Thu, 07 Mar 2019 06:08:00 -0800
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Subject: [mpls] Eric Rescorla's Discuss on draft-ietf-mpls-sfc-05: (with DISCUSS and COMMENT)
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Eric Rescorla has entered the following ballot position for
draft-ietf-mpls-sfc-05: Discuss

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----------------------------------------------------------------------
DISCUSS:
----------------------------------------------------------------------

Rich version of this review at:
https://mozphab-ietf.devsvcdev.mozaws.net/D5624


I have what may be a simple question or a real interop problem, as
noted below. Hopefully it's the former and we can resolve it quickly.



DETAIL
S 13.
>         and defined in [RFC8300].
>   
>      Metadata:  The actual metadata formatted as described in whatever
>         document defines the metadata.  This field is end-padded with zero
>         to three octets of zeroes to take it up to a four octet boundary.
>   

What happens if the packet gets lost? Is there an ACK? How often
should I send it?


----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

S 12.1.
>          ---------------
>   
>                      Figure 4: The MPLS SFC Metadata Label
>   
>      The Metadata Label value is an index into a table of metadata that is
>      programmed into the network using in-band or out-of-band mechanisms.

You note below that the network needs to be secure. You should also
note that access to this table needs to be secure.