show warning when using VLAN 1 on a VLAN aware bridge

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>

diff --git a/src/PVE/Network.pm b/src/PVE/Network.pm
index 0a984ad32f9e51bc0ab145c073253991edb5dcf1..71af2b889bbbd6da5ce6651581c6197bf531935d 100644 (file)
--- a/src/PVE/Network.pm
+++ b/src/PVE/Network.pm
@@ -179,6 +179,8 @@ my $bridge_add_interface = sub {
        if ($tag) {
            system("/sbin/bridge vlan add dev $iface vid $tag pvid untagged") == 0 ||
            die "unable to add vlan $tag to interface $iface\n";
+
+           warn "Caution: Setting VLAN ID 1 on a VLAN aware bridge may be dangerous\n" if $tag == 1;
        } else {
            system("/sbin/bridge vlan add dev $iface vid 2-4094") == 0 ||
            die "unable to add default vlan tags to interface $iface\n" if !$trunks;