Port-Based Q-In-Q - ZyXEL Communications VES1724-56 User Manual

Chapter 23 VLAN Stacking
Table 91 Advanced Application > VLAN Stacking (continued)
LABEL DESCRIPTION
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 Port for ingress ports at the edge of the service provider's network.
Select Tunnel Port (available for Gigabit ports only) for egress ports at the edge of the service
provider's network. Select Tunnel Port to have the Switch add the Tunnel TPID 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 is a standard Ethernet type code identifying the frame and indicates whether the frame
TPID 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 port(s). 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. 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.

23.4.1 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 they have different customer VLAN IDs.
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VES1724-56 User's Guide