[ovs-discuss] How to see if the physical host is seeing VLAN tagged packets correctly leaving/arriving on the eth0 interface?

[Ben Pfaff]

On Wed, Jul 28, 2010 at 10:24 PM, 陈文龙 <qzchenwl at gmail.com> wrote:
> The physical host is running OvS.
> ovs-vsctl add-br br0
> ovs-vsctl add-port br0 tap1.0 tag=100
> How to see if the packet from/to tap1.0 is tagged right?

You could use tcpdump on a trunk port, e.g.:
    tcpdump -pne -i eth0 vlan 100
presuming that eth0 is a trunk port also on br0.

(Be sure to include the "vlan 100" keywords on the tcpdump command line.
tcpdump is not very good about dealing with vlans and needs a bit of
help.)