SMC Networks TigerAccess SMC7816M - Manual (Page 361)

C
ONFIGURING
IEEE 802.1Q T
UNNELING
13-31
necessary to support real-time services across the backbone network,
then you may have to enable priority bit mapping from the inner to outer
VLAN tag to ensure timely service.
Web – Click VLAN, 802.1 Q Tunneling. Set the mode for the tunnel port
to Dot1q-Tunnel, set the TPID if the client is using a non-standard
ethertype to identify 802.1Q tagged frames, and specify whether or not to
copy the priority bits from the inner VLAN tag to the outer tag. Then click
Apply.
Figure 13-13 Tunnel Port Configuration