Vlan Stacking - ZyXEL Communications MS-7206 - EDITION 1 Manual

Chapter 26 VLAN Stacking
Configure the fields as circled in the switch VLAN Stacking screen.
Table 51 Single and Double Tagged 802.1Q Frame Format
DA SA SPTPID Priority VID TPID Priority VID
Table 52 802.1Q Frame
DA
SA
(SP)TPID
VID

26.4 VLAN Stacking

Use this screen to add an outer VLAN tag to the inner IEEE 802.1Q tagged frames
that enter the network. If a service provider assigns an outer VLAN tag for each
customer, the service provider's customers can assign their own inner VLAN tags
without creating overlapping VLANs in the service provider's network.
This allows a service provider to provide different service, based on specific
VLANs, for many different customers and to distinguish between multiple
customers' VLANs, even if they have the same VLAN ID, within its network.
176
DA SA
Destination Address
Source Address
(Service Provider) Tag Protocol
IDentifier
VLAN ID
DA SA Len/
Etype
TPID Priority VID Len/
Etype
Len/
Etype
Priority 802.1p Priority
Len/ Length and type of Ethernet
Etype frame
Data Frame data
FCS Frame Check Sequence
Data FCS Untagged
Ethernet
frame
Data FCS IEEE
802.1Q
customer
tagged
frame
Data FCS Double-
tagged
frame
MS-7206 User's Guide