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7-32

QinQ (Provider Bridging)

Event Log Messages

Please see the Event Log Message Reference Guide for information about

Event Log messages.

Stacking In QinQ mixed vlan mode:

• Stacking is only supported on C-VLANs. The device does not advertise

itself (using the stack discovery protocol) in the S-VLAN space.

In QinQ svlan mode:

• Stacking discovery protocol frames will not be sent out of

customer-network ports; similarly, any stacking discovery protocol

frames received on customer-network ports will be dropped.

UDLD In QinQ mixed vlan or svlan modes:

• UDLD frames received on udld-disabled customer network ports will

be dropped. However, if the customer-network port is udld-enabled, it

can peer with a customer device.

• UDLD frames received on udld-disabled provider network ports will be

reforwarded out of other udld-disabled provider network ports on the

same VLAN.

• UDLD reforwarding in the C-VLAN space (QinQ disabled or mixed vlan

mode) will remain unaltered.

udp-bcast-

forward

In QinQ svlan mode:

• udp-bcast-forward is NOT supported on provider core devices.

unknown-vlans In QinQ mixed vlan mode:

• GVRP (learn and disabled modes) not supported on S-VLAN ports.

• A C-VLAN port that has GVRP enabled will need to disable it before it

can be added to S-VLANs.

Voice VLANs In QinQ mixed vlan mode:

• S-VLANs cannot be configured as voice-VLANs.

VRRP In QinQ mixed vlan or svlan modes:

• VRRP is NOT supported on S-VLANs.

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