Created attachment 180317 [details] patch for if_tap.c For now tap(4) devices advertise itself as just 'ethernet autoselect', without duplex or speed capabilities. This advertisement makes them unable to be aggregated into lacp-based lagg(4): - lacp code requires underlying interfaces to be full-duplex, else interface will not participate in lacp at all[1] - lacp code requires underlying interface to have non-zero speed, else this interface can not be selected as active aggregator[2]. [1]: https://svnweb.freebsd.org/base/stable/11/sys/net/ieee8023ad_lacp.c?revision=313038&view=markup#l478 [2]: https://svnweb.freebsd.org/base/stable/11/sys/net/ieee8023ad_lacp.c?revision=313038&view=markup#l952
A commit in branch main references this bug: URL: https://cgit.FreeBSD.org/src/commit/?id=0ec220df526d38c73650301c1300a6fe3124698a commit 0ec220df526d38c73650301c1300a6fe3124698a Author: Alexandre Snarskii <snar@snar.spb.ru> AuthorDate: 2023-05-31 15:50:00 +0000 Commit: Warner Losh <imp@FreeBSD.org> CommitDate: 2023-05-31 15:53:48 +0000 tap(4): allow full-duplex and non-zero speed tap(4) devices advertise themselves as just 'ethernet autoselect', without duplex or speed capabilities. This advertisement makes them unable to be aggregated into lacp-based lagg(4): - lacp code requires underlying interfaces to be full-duplex, else interface will not participate in lacp at all - lacp code requires underlying interface to have non-zero speed, else this interface can not be selected as active aggregator PR: 217374 Reported-by: Alexandre Snarskii <snar@snar.spb.ru> Co-authored-by: Mina Galić <freebsd@igalic.co> Reviewed-by: imp,karles Pull-request: https://github.com/freebsd/freebsd-src/pull/745 sys/net/if_tuntap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)