[ovs-discuss] Stripping VLAN tags in Openflow 1.1+

[Ben Pfaff]

On Thu, Mar 10, 2016 at 10:51:35AM -0800, Ben Warren wrote:
> Hi,
> 
> I’m wondering how to strip VLAN tags when using OpenFlow version 1.1 or greater messaging.  The “strip_vlan” action in “ovs-ofctl” seems to be version 1.0-only.  The “parse_op_flow_mod_str()” function returns 0xa, which = (OFPUTIL_P_OF10_STD_TID | OFPUTIL_P_OF10_NXM_TID).  I’ve tried the following:
> 
> 	• Use “pop_vlan” instead of “strip_vlan”, but they seem to be aliased
> 	• Use “mod_vlan_vid=0”, but that still sends 802.1Q frames
> 	• Use “mod_vlan_vid=-1” and “mod_vlan_vid=0xffff”, but get syntax errors 

Make sure you match on the presence of a VLAN tag; OF1.1+ requires this.