C
ONFIGURING
IEEE 802.1Q T
UNNELING
32-27
• The packet must have a standard ethertype value of 0x8100 for this
command to take effect. Otherwise, the priority bits in the outer tag
are set to zero.
• Using a fixed priority level for all customer traffic allows the service
provider to more easily calculate the resources required to maintain
adequate bandwidth for a large number of customers. How ever, if it
is necessary to support real-time services across the backbone
network, then you may have to enable priority bit mapping from the
inner to outer VLAN tag to ensure timely service.
Example
This example disables QinQ priority mapping, and uses the def ault port
priority configured on the edge switch connecting the customer to the
service provider’s network.
switchport mode dot1q-tunnel
This command configures an interface as a QinQ tunnel port. Use the no
form to restore the default setting.
Syntax
switchport mode dot1q-tunnel
no switchport mode
dot1q-tunnel – Sets the port as an 802.1Q tunnel port.
Default Setting
All ports are in hybrid mode.
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
•Use the switchport mode command to set the switch to QinQ mode
before entering this command.
• When a tunnel port receives a packet from the customer, the customer
tag (regardless of whether there are one or more tag layers) is copied
Console(config)#no qinq priority map
Console(config)#