Without this patch, BIRD complains about interfaces without an IP address: 2019-08-12 07:41:26 <ERR> KIF: Invalid interface address 0.0.0.0 for vtnet2 --- sysdep/bsd/krt-sock.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sysdep/bsd/krt-sock.c b/sysdep/bsd/krt-sock.c index f0cebd11c5b7..f92cf1a68dc6 100644 --- a/sysdep/bsd/krt-sock.c +++ b/sysdep/bsd/krt-sock.c @@ -651,6 +651,8 @@ krt_read_addr(struct ks_msg *msg, int scan) imask = ipa_from_sa(&mask); ibrd = ipa_from_sa(&brd); + if (ipa_zero(iaddr)) + return; if ((masklen = ipa_masklen(imask)) < 0) { -- 2.23.0.rc1