Adding An Interface To A Qinq Tunnel - SMC Networks SMC8126L2 Management Manual

3
Configuring the Switch
CLI – This example sets the switch to operate in QinQ mode.
Console(config)#dot1q-tunnel system-tunnel-control
Console(config)#exit
Console#show dot1q-tunnel
Current double-tagged status of the system is Enabled
The dot1q-tunnel mode of the set interface 1/1 is Access mode, TPID is
0x8100.
The dot1q-tunnel mode of the set interface 1/2 is Uplink mode, TPID is
0x8100.
The dot1q-tunnel mode of the set interface 1/3 is Normal mode, TPID is
0x8100.
The dot1q-tunnel mode of the set interface 1/4 is Normal mode, TPID is
0x8100.
The dot1q-tunnel mode of the set interface 1/5 is Normal mode, TPID is
0x8100.
.
.
The dot1q-tunnel mode of the set interface 1/24 is Normal mode, TPID is
0x8100.
Console#

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. 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.
Command Usage
• Use the 802.1Q Tunnel Status screen to set the switch to QinQ mode before
configuring a tunnel port (see "Displaying Basic VLAN Information" on page 3-126).
• Use the TPID field to set a custom 802.1Q ethertype value on the selected
interface. This feature allows the switch to interoperate with third-party switches
that do not use the standard 0x8100 ethertype to identify 802.1Q-tagged frames.
For example, 0x1234 is set as the custom 802.1Q ethertype on a trunk port,
incoming frames containing that ethertype are assigned to the VLAN contained in
the tag following the 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 members of a VLAN should be set to the same ethertype.
Command Attributes
• Mode – Set the VLAN membership mode of the port. (Default: Normal)
- Normal – The port operates in its normal VLAN mode.
- 802.1Q Tunnel – 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.
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