: It will do multicast happily. You may well need to do
Nope. gated uses dstaddr in joining/leaving multicast groups
on point-to-point interfaces.
I consider it as VERY dirty BSD trick to fix wrong API
and preferred to fix the problem of "unnumbered" interfaces
by extending BSD API (ip_mreqn etc.).
Maybe, 2.0 still need this weird BSDism.
BTW I see no programs (except for gated) that uses this BSD feature.
Alexey Kuznetsov.