From: Shmulik Ladkani <shmulik.ladk...@gmail.com>
Date: Mon, 19 Sep 2016 19:11:08 +0300
> TCA_VLAN_ACT_MODIFY allows one to change an existing tag.
> It accepts same attributes as TCA_VLAN_ACT_PUSH (protocol, id,
> If packet is vlan tagged, then the tag gets overwritten according to
> user specified attributes.
> For example, this allows user to replace a tag's vid while preserving
> its priority bits (as opposed to "action vlan pop pipe action vlan push").