![](/images/backgrounds/127146/127146-337169x1.png)
The following table describes the labels in this screen.
Table 51 | VLAN Stacking |
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|
LABEL | DESCRIPTION |
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|
Active | Select this checkbox to enable VLAN stacking on the switch. |
|
|
SP TPID | SP TPID is a standard Ethernet type code identifying the frame and indicates whether the |
| frame carries IEEE 802.1Q tag information. Choose 0x8100 or 0x9100 from the |
| list box or select Others and then enter a |
| 0xFFFF. 0x denotes a hexadecimal number. It does not have to be typed in the Others text |
| field. |
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 |
| 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 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. |
| 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. |
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 Chapter 8 on page 85 for more |
| background information on VLAN ID. |
Priority | On the switch, configure priority level of inner IEEE 802.1Q tag in the Port Setup screen. |
| "0" is the lowest priority level and "7" is the highest. |
|
|
Apply | Click Apply to save your changes back to the switch. |
|
|
Cancel | Click Cancel to begin configuring this screen afresh. |
Chapter 21 VLAN Stacking | 167 |