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Re: [Detnet] [mpls] [Pals] draft-decraene-mpls-slid-encoded-entropy-label-id (was RE: Please review the PALS/MPLS/DetNet Joint Session minutes)

Tony Li <tony.li@tony.li> Fri, 01 April 2022 16:39 UTC

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Sender: Tony Li <tony1athome@gmail.com>
From: Tony Li <tony.li@tony.li>
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Date: Fri, 01 Apr 2022 09:38:56 -0700
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Cc: mpls <mpls@ietf.org>, detnet WG <detnet@ietf.org>, "pals@ietf.org" <pals@ietf.org>, Greg Mirsky <gregimirsky@gmail.com>
To: bruno.decraene@orange.com
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Subject: Re: [Detnet] [mpls] [Pals] draft-decraene-mpls-slid-encoded-entropy-label-id (was RE: Please review the PALS/MPLS/DetNet Joint Session minutes)
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Bruno,

> However, this is not a guarantee. Any design that attempts to reuse this TTL field does run a non-zero risk of being impacted by designs that do check and reject such entries.
> [Bruno] RFC 6790 also says that on the Egress LSR “The EL's TTL MUST be ignored.”
> https://datatracker.ietf.org/doc/html/rfc6790#section-4.1 <https://datatracker.ietf.org/doc/html/rfc6790#section-4.1>

Thank you, that’s a good point.  However, that’s still not a guarantee (i.e. 100% mathematical certainty). There is still risk involved. Small, but non-zero.

T

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