Do not create loopback interfaces lo1, lo2, ... upfront. They are

automatically set up by the kernel when a routing domain is created.
An existing lo1 in rdomain 0 would prevent to add any interfaces
in rdomain 1.
OK kn@

diff --git a/etc/netstart b/etc/netstart
index b937a70..b36b340 100644 (file)
--- a/etc/netstart
+++ b/etc/netstart
@@ -1,6 +1,6 @@
 #!/bin/sh -
 #
-#      $OpenBSD: netstart,v 1.215 2021/08/30 16:58:52 bluhm Exp $
+#      $OpenBSD: netstart,v 1.216 2021/09/02 19:38:20 bluhm Exp $
 
 # Turn off Strict Bourne shell mode.
 set +o sh
@@ -103,6 +103,9 @@ vifscreate() {
                        [[ -f $_hn ]] || continue
                        _if=${_hn#/etc/hostname.}
 
+                       # loopback for routing domain is created by kernel
+                       [[ -n ${_if##lo[1-9]*} ]] || continue
+
                        if ! ifcreate $_if; then
                                print -u2 "${0##*/}: create for '$_if' failed."
                        fi