Re: [v6ops] Operational Implications of IPv6 Packets with Extension Headers - implications from new development for EHs

Gert Doering <> Wed, 29 July 2020 09:21 UTC

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Date: Wed, 29 Jul 2020 11:21:11 +0200
From: Gert Doering <>
To: Vasilenko Eduard <>
Cc: Gert Doering <>, Fernando Gont <>, IPv6 Operations <>
Message-ID: <20200729092111.GK2485@Space.Net>
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Subject: Re: [v6ops] Operational Implications of IPv6 Packets with Extension Headers - implications from new development for EHs
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On Wed, Jul 29, 2020 at 09:10:28AM +0000, Vasilenko Eduard wrote:
> This approach is not universal. We need something better.
> Some EHs (like APN6 or Network Token) do make sense only cross-border. 

It might be possible to make this work between cooperating networks.

For generic "across the wide internet, without underlying commercial
relationships that ensure that a particular EH will work" EHs do not
work well enough to be a suitable tool.

Not my decision.  

Just observation after 20 years of living with some of the ivory tower
silliness that went into IPv6 protocol design.  Like "it should be hard
to handle EHs in middleboxes" and "make this an unbounded chain! 
computers love unbounded work!"

> Because source to attach EH is assumed outside of administrative domain. Just today was discussion about "how to make Alternative Marking cross-border".
> Moreover, "business" by definition is between different legal entities. If all these new fancy features are not related to business - many people would be very sorry.

The Internet is, generally speaking, in a very sorry state.

Nothing new here.

Gert Doering
        -- NetMaster
have you enabled IPv6 on something today...?

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