ZyXEL Communications MES3500-24S User Manual page 195

Figure 111 Advanced Application > VLAN Stacking
The following table describes the labels in this screen.
Table 80 Advanced Application > VLAN Stacking
LABEL DESCRIPTION
Active Select this checkbox to enable VLAN stacking on the Switch.
Port The port number identifies the port you are configuring.
* 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 Port to have the Switch add the SP TPID tag to all incoming frames received on this port.
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 carries
TPID 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.
Chapter 24 VLAN Stacking
MES3500-24S/MGS3520 Series User's Guide
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