ZyXEL Communications XS3800-28, User Manual, Page: 453 / 789

Chapter 60 VLAN Stacking
XS3800-28 User’s Guide
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The following table describes the labels in this screen.
60.5 Port-Based Q-in-Q
Port-based Q-in-Q lets the Switch treat all frames received on the same port as the same VLAN flows
and add the same outer VLAN tag to them, even if they have different customer VLAN IDs.
Click SWITCHING > VLAN Stacking > Port-Based QinQ to display the screen as shown.
Table 225 SWITCHING > VLAN Stacking > VLAN Stacking
LABEL DESCRIPTION
Active Enable the switch button to enable VLAN stacking on the Switch.
SLOT This field appears only in Stacking mode. Click the drop-down list to choose the slot number of the
Switch in a stack.
Port This field displays the port number. In Stacking mode, the first number represents the slot ID and the
second is the port number. Please note that the default stacking ports (the last four ports of your
Switch) cannot be configured. They are reserved for stacking only.
* Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all ports. Use this row first to set the
common settings and then make adjustments on a port-by-port basis.
Note: Changes in this row are copied to all the ports as soon as you make them.
Role Select Normal to have the Switch ignore frames received (or transmitted) on this port with VLAN
stacking tags. Anything you configure in SPVID and Priority of the Port-based QinQ or the Selective
QinQ screen are ignored.
Select Access to have the Switch add the SP TPID tag to all incoming frames received on this port.
Select Access for ingress ports at the edge of the service provider's network.
Select Tunnel (available for Gigabit ports only) for egress ports at the edge of the service provider's
network. Select Tunnel to have the Switch add the Tunnel TPID (HEX) tag to all outgoing frames
sent on this port.
In order to support VLAN stacking on a port, the port must be able to allow frames of 1526 Bytes
(1522 Bytes + 4 Bytes for the second tag) to pass through it.
Tunnel TPID
(HEX) TPID is a standard Ethernet type code identifying the frame and indicates whether the frame
carries IEEE 802.1Q tag information. Enter a four-digit hexadecimal number from 0000 to FFFF that
the Switch adds in the outer VLAN tag of the frames sent on the tunnel ports. The Switch also uses
this to check if the received frames are double-tagged.
The value of this field is 0x8100 as defined in IEEE 802.1Q. It is used to identify the customer tag of an
incoming frame. If the Switch needs to communicate with other vendors’ devices, they should use
the same TPID.
Note: You can define up to four different tunnel TPIDs (including 8100 ) in this screen at a
time.
Apply Click Apply to save your changes to the Switch’s run-time memory. The Switch loses these changes
if it is turned off or loses power, so use the Save link on the top navigation panel to save your
changes to the non-volatile memory when you are done configuring.
Cancel Click Cancel to begin configuring this screen afresh.