Re: CVS commit: src

[nia <nia%NetBSD.org@localhost>]

On Wed, May 25, 2022 at 08:42:20AM -0400, Greg Troxel wrote:
> I was really surprisd that we had mbone applications in base; to me,
> that would mean things like vic and vat.
> 
> This is not about about MBONE; it's about multicast routing.  The mbone
> was an overlay network to connect local multicast islands, and operated
> in the 90s.

Interesting, thanks.

> Separately from the mbone, I have used multicast routing support in
> NetBSD across connected local networks.
> 
> (Arguably map-mbone is misnamed; it really isn't about the mbone per se
> but about whatever multicast network is available.  But that's just a
> historical note.)

Is the name situation same for the category in pkgsrc?

> I don't object to a default-on MK knob; having knobs to make base
> smaller seems entirely reasonable.
> 
> I would suggest "multicast" as a word rather than mbone, as what this
> knob does is remove user-space support for IP multicast routing.
> Someone who understands the history would not expect mrouted to vanish
> by disabling mbone.

All of these applications depends on the "MROUTING" kernel option,
it seems, which is mostly default-off, except for a few (tending
on the more obscure side) kernel configs. I wonder if anyone
knows the history there.