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7-20

QinQ (Provider Bridging)

Updating QinQ Configurations

This section considers the impacts of updating QinQ modes and configuration

settings on the switch.

Changing QinQ Modes

Changing QinQ modes (and/or disabling QinQ operations) will result in the

current configuration being erased. See the following Caution for details.

Caution Configuring the switch to operate in a different bridge mode requires a reboot

to take effect. Upon reboot, all configuration information for the prior

QinQ mode will be lost. Any configurations created under the existing QinQ

mode will be erased, and the device will boot up with a default configuration

for the new QinQ mode.

For information on the effect of the different QinQ modes on switch protocols

and operations, refer to Table 7-2 on page 7-26.

Disabling QinQ

To disable QinQ once it has been enabled, you would issue the following

commands from configuration mode on the CLI.

Changing VLAN Port Memberships (Mixed Vlan Mode)

On mixed vlan mode devices, certain per-port features are not supported on

S-VLANs that are supported on C-VLANs. Ports that are currently members of

a regular VLAN can only move to an S-VLAN if there is no conflicting config-

uration.

Syntax: no qinq

This is the default mode when QinQ is disabled on the switch.

Moving into this configuration from another qinq configuration

requires a reboot to take effect. Upon reboot, all configuration

information for the prior QinQ mode will be lost.

Default setting. Standard VLAN operations apply.

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