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IS230-10GP Industrial layer 2 Switch Web User Guide
55
Q-in-Q
Q-in-Q is commonly referred as VLAN stacking in which VLANs are nested
by adding two tags to each frame instead of one. Network service provider
and users both can use VLANs and makes it possible to have more than
the 4094 separate VLANs allowed by 802.1Q.
There are three ways in which a machine can be connected to a network
carrying double-tagged 802.1ad traffic:
via a untagged port, where both inner and outer VLANs are handled by
the switch or switches (so the attached machine sees ordinary
Ethernet frames);
via a single-tagged (tunnel) port, where the outer VLAN only is handled
by the switch (so the attached machine sees single-tagged 802.1Q
VLAN frames); or
via a double-tagged (trunk) port, where both inner and outer VLANs
are handled by the attached machine (which sees double-tagged
802.1ad VLAN frames).
Global Settings
The Global Settings page allows you to set the outer VLAN Ethertype
setting.
To access this page, click
L2 Switching
>
Q-in-Q
>
Global Settings
.
Figure 28. L2 Switching > Q-in-Q > Global Settings
The following table describes the items in Figure 28.
The
QinQ Global Information
settings in the ensuing table are
informational only: Outer VLAN Ethertype.
Table 25. Q-in-Q Global Settings
Item
Description
Outer VLAN Ether-
type
Enter the outer VLAN handled by the switch giving the attached
machine a single-tagged 802.1Q VLAN frame.
Apply
Click
Apply
to save the values and update the screen.
Summary of Contents for IS230-10GP
Page 1: ...613 002603 Rev B IS230 10GP Industrial Ethernet Layer 2 Switch Web User Guide ...
Page 7: ...Contents 8 ...
Page 11: ...Figures 12 ...
Page 15: ...Tables 16 ...
Page 19: ...Preface 20 ...