Enable hardware VLAN tagging

Turns out that hardware VLAN tagging is required to use VLANs at all
(while QinQ VLANs are not filtered regardless...). On top of that a
PowerShell command needs to be executed to configure Trunk mode on
virtual interfaces.  An example of such command is:

    Set-VMNetworkAdapterVlan -VMName OpenBSD -Trunk \
        -AllowedVlanIdList 10-100 -NativeVlanId 5

This will enable trunking mode on all hvn(4) interfaces.  An option
-VMNetworkAdapterName can be passed to turn trunking on one interface,
and although by default all networking interfaces have the same name
"Network Adapter", a "Rename-VMNetworkAdapter" command can be used
to rename them one by one.

1 files changed, 1 insertions, 1 deletions

diff --git a/sys/dev/pv/if_hvn.c b/sys/dev/pv/if_hvn.c
index 801ac5b15e4..ecd8703c529 100644
--- a/sys/dev/pv/if_hvn.c
+++ b/sys/dev/pv/if_hvn.c
@@ -278,7 +278,7 @@ hvn_attach(struct device *parent, struct device *self, void *aux)
 
 	if (sc->sc_proto >= HVN_NVS_PROTO_VERSION_2) {
 		ifp->if_hardmtu = HVN_MAXMTU;
-#if NVLAN > 0 && notyet
+#if NVLAN > 0
 		ifp->if_capabilities |= IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_MTU;
 #endif
 	}