[Ecn-sane] [Bloat] sce materials from ietf

[Carsten Bormann]

On Nov 30, 2019, at 15:32, Jonathan Morton <chromatix99 at gmail.com> wrote:
> 
> There are unfortunate problems with introducing new TCP options, in that some overzealous firewalls block traffic which uses them.  This would be a deployment hazard for SCE, which merely using a spare header flag avoids.  So instead we are still planning to use the spare bit - which happens to be one that AccECN also uses, but AccECN negotiates in such a way that SCE can safely use it even with an AccECN capable partner.

This got me curious:  Do you have any evidence that firewalls are friendlier to new flags than to new options?

Grüße, Carsten