ZyXEL Communications Plumbing Product metrogigabit switch User Manual

 Chapter 23 VLAN Stacking

MGS3700-12C User’s Guide

Selective Q-in-Q is VLAN-based. It allows the Switch to add different outer VLAN 
tags to the incoming frames received on one port according to their inner VLAN 
tags.

Note: Selective Q-in-Q rules are only applied to single-tagged frames received on the 

access ports. If the incoming frames are untagged or single-tagged but 
received on a tunnel port or cannot match any selective Q-in-Q rules, the 
Switch applies the port-based Q-in-Q rules to them.

Click Selective QinQ in the Advanced Application > VLAN Stacking screen to 
display the screen as shown.

Figure 110   Advanced Application > VLAN Stacking > Selective QinQ 

The following table describes the labels in this screen. 

Table 65   Advanced Application > VLAN Stacking > Selective QinQ

Active

Check this box to activate this rule. 

Name

Enter a descriptive name (up to 32 printable ASCII characters) for identification 
purposes. 

Port

The port number identifies the port you are configuring.

CVID

Enter a customer VLAN ID (the inner VLAN tag) from 1 to 4094. This is the 
VLAN tag carried in the packets from the subscribers.

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.