User Guide 228
Configuring VLAN-VPN Basic VLAN-VPN Configuration
Step 4 switchport dot1q-tunnel mode { nni | uni }
Select the port role that will take effect in the VLAN-VPN function.
nni
: NNI ports are usually connected to the ISP network, and the packets forwarded by
these port have outer VLAN tags.
uni
: UNI ports are usually connected to the customer network. The outer VLAN tags will be
added or removed when the packets are forwarded by the UNI port.
Note:
The direct shift between ports modes uni and nni is not supported. To switch from the current
mode to another mode, you can use no switchport dot1q-tunnel mode to disable the current
mode.
Step 5 switchport dot1q-tunnel tpid
tpid
Specify the value of TPID. TPID is a field of VLAN tag and is modified to make the double
tagged packets identifiable to devices from different vendors.
tpid:
Enter the IPID for the port. It must be 4 Hex integers. By default, it is 8100.
Step 6 switchport dot1q-tunnel missdrop
Enable the Missdrop feature. This option only can take effect on tagged packets. With
Missdrop enabled, the tagged packets that don’t match the VLAN Mapping entries will be
dropped. By default, it is disabled.
Note:
For T2600G-28TS/T2600G-28MPS/T2600G-28SQ/T2600G-52TS, Missdrop can only be
enabled on UNI ports.
For T2600G-18TS, Missdrop can only be enabled on NNI ports.
Step 7 switchport dot1q-tunnel use_inner_priority
Enable this function and the switch will determine the forwarding sequence of the packets
according to the 802.1p priority of the inner VLAN tag. By default, it is disabled.
It is available only when the port mode is UNI.
Step 8 show dot1q-tunnel
Verify the global configuration of VLAN-VPN.
Step 9 show dot1q-tunnel interface
Verify the interface configuration of basic VLAN-VPN.
Step 10 end
Return to privileged EXEC mode.
Step 11 copy running-config startup-config
Save the settings in the configuration file.
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