Re: [pim] Q on the congestion awareness of routing protocols

[Toerless Eckert <[e-mail]>]

On Tue, Dec 06, 2022 at 07:15:31AM +0000, Jon Crowcroft wrote:
> path exploration? but consider the shadow pricing...
> 
> the tradeoff between convergence rate and congestion control seems to
> be something that ought to be put on a more systematic grounding

You folks are all thinking way beyond the point i was making and looking for support:

In PIM, we have potentially gigantic burst of datagrams without any
specification of pacing sent to routers across a network core (with easily
likelyhood of path congestion). Such a totally non-congestion aware sending
of protocol packets should not be permitted anymore for new RFC IMHO
and i am just baffled how this is permitted anymore by the IETF. Where
is adult supervision by TSV when we need it ;-)

Yes, the incast issue is an interesting aspect, but i have not seen good
simulations whether / to-what-extend it would happen in the PIM/BGP cases,
but i would bet any sum, that a TCP solution, as bad as it may be will
outperform the no-congestion-control periodic burst solution of (datagram) PIM.

Cheers
    Toerless