GE GE-DS-242-POE, User Manual

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Chapter 4: Web-Based Management
68 GE-DS-242-PoE Managed Ethernet Switch User Manual
OBJECT DESCRIPTION
Check Configures IEEE 802.1Q tunneling (QinQ) for an uplink
port to another device within the service provider
network.
QinQ Uplink
Cancel Configures IEEE 802.1Q tunneling (QinQ) for a client
access port to segregate and preserve customer VLAN
IDs for traffic crossing the service provider network.
Q-in-Q Tunnel Setting
Business customers of service providers often have specific requirements for VLAN
IDs and the number of VLANs to be supported. The VLAN ranges required by different
customers in the same service-provider network might overlap, and traffic of
customers through the infrastructure might be mixed. Assigning a unique range of
VLAN IDs to each customer would restrict customer configurations and could easily
exceed the VLAN limit (4096) of the IEEE 802.1Q specification.
Using the QinQ feature, service providers can use a single VLAN to support customers
who have multiple VLANs. Customer VLAN IDs are preserved, and traffic from
different customers is segregated within the service-provider network, even when
they appear to be in the same VLAN. Using QinQ expands VLAN space by using a
VLAN-in-VLAN hierarchy and retagging the tagged packets. A port configured to
support QinQ is called a QinQ user-port. A port configured to support QinQ Uplink is
called a QinQ uplink-port.
Figure 4-32: Q-in-Q Tunnel Setting interface
To configure QinQ Port
1. Enable global QinQ function: select QinQ enable "Enable" .
2. Fill QinQ Tpid.
3. Enable port QinQ function: select QinQ checkbox for special port.
4. Enable port QinQ Uplink function: select QinQ Uplink checkbox for special port.