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Chapter 21 VLAN Stacking
XS3900-48F User’s Guide
169
21.4.1 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.
Click Port-based QinQ in the Advanced Application > VLAN Stacking screen to display the
screen as shown.
Figure 87
Advanced Application > VLAN Stacking > Port-based QinQ
The following table describes the labels in this screen.
Tunnel
TPID
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 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.
Table 64
Advanced Application > VLAN Stacking (continued)
LABEL
DESCRIPTION
Table 65
Advanced Application > VLAN Stacking > Port-based QinQ
LABEL
DESCRIPTION
Port
The port number identifies the port you are configuring.
SPVID
SPVID is the service provider’s VLAN ID (the outer VLAN tag). Enter the service provider ID (from
1 to 4094) for frames received on this port. See
for more background
information on VLAN ID.