[ih] Source routing

[Andrew G. Malis]

Dave,

Source routing is very much back in favor, mainly for traffic engineering
but for other applications as well. Check out the work in the IETF's SPRING
WG, https://datatracker.ietf.org/wg/spring/about/ , which defines source
routing for IPv4 via MPLS and natively in IPv6.

Cheers,
Andy


On Sun, Feb 2, 2025 at 1:37 PM Dave Crocker via Internet-history <
internet-history at elists.isoc.org> wrote:

> My recollection is that mechanisms for source routing were common in the
> early days, but lost favor.
>
> UUCP networking (!) was a version.  SMTP originally supported it.  I
> don't think Arpanet packets did, though I have a vague sense there was
> some selectivity allowed.  And I don't think IP did.
>
> I'm curious about a rough summary of when and how it was used and when
> and why it lost favor.
>
> d/
>
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> Dave Crocker
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