Installation manual

3-195
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ethertype field, as they would be with a standard 802.1Q trunk. Frames arriving on the
port containing any other ethertype are looked upon as untagged frames, and assigned
to the native VLAN of that port.
• All ports on the switch will be set to the same ethertype.
Command Attributes
• 802.1Q Tunnel Status – Sets the switch to QinQ mode, and allows the QinQ tunnel port
to be configured. The default is for the switch to function in normal mode.
• 802.1Q Ethernet Type – The Tag Protocol Identifier (TPID) specifies the ethertype of
incoming packets on a tunnel port. (Range: hexadecimal 0800-FFFF; Default: 8100)
Web – Click VLAN, 802.1Q VLAN, 802.1Q Tunnel Configuration. Check the Enabled box,
set the TPID of the ports if the client is using a non-standard ethertype to identify 802.1Q
tagged frames, and click Apply.
Figure 3-106 802.1Q Tunnel Status and Ethernet Type
CLI – This example sets the switch to operate in QinQ mode.
Adding an Interface to a QinQ Tunnel
Follow the guidelines in the preceding section to set up a QinQ tunnel on the switch. Use
the VLAN Port Configuration or VLAN Trunk Configuration screen to set the access port
on the edge switch to 802.1Q Tunnel mode.
Command Usage
• Use the 802.1Q Tunnel Status screen to set the switch to QinQ mode before configuring
a tunnel port (see “Enabling QinQ Tunneling on the Switch” on page 3-194). Also set the
Tag Protocol Identifier (TPID) value of the tunnel port if the attached client is using a
nonstandard 2-byte ethertype to identify 802.1Q tagged frames (see “Enabling QinQ
Console(config)#dot1q-tunnel system-tunnel-control 4-251
Console(config-if)#switchport dot1q-tunnel tpid 9100 4-253
Console(config)#exit
Console#show dot1q-tunnel
4-253
Current double-tagged status of the system is Enabled
The dot1q-tunnel mode of the set interface 1/1 is Access mode, TPID is 0x9100.
The dot1q-tunnel mode of the set interface 1/2 is Uplink mode, TPID is 0x9100.
The dot1q-tunnel mode of the set interface 1/3 is Normal mode, TPID is 0x9100.
The dot1q-tunnel mode of the set interface 1/4 is Normal mode, TPID is 0x9100.
The dot1q-tunnel mode of the set interface 1/5 is Normal mode, TPID is 0x9100.
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