Dear Matt Crawford,
You said,
> What I've implemented on all our systems and routers is much more
> robust and I think it should be added to a new rev of the host &
> router requirements docs immediately:
>
> Every host sending a packet SHALL encapsulate that packet using
> the appropriate IP-in-IP header and send it to the all-routers
> multicast address. Routers receiving such a packet SHALL
> decapsulate and forward it.
>
> Sure, this leads to some duplicatation, but that's allowed by the IP
> spec. It does prevent the occasional configuration error from
> stopping the communication.
Your wording seems to indicate to me that that SHALL is to be interpreted as
MUST. To me that is disagreeable, as it punishes properly configured nodes as
badly as incorrectly nodes. Perhaps the behaviour you recommend should be set
as a default for hosts and routers and giving the operators some kind of
mechanism to change that default behaviour.
Yours sincerely,
Robert Honore.
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