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Set the Tag Protocol Identifier (TPID) value of the tunnel access port.
4.
This step is required if the attached client is using a nonstandard 2-byte
ethertype to identify 802.1Q tagged frames. The standard ethertype
value is 0x8100. (See
Configure the QinQ tunnel access port to join the SPVLAN as an
5.
untagged member
Configure the SPVLAN ID as the native VID on the QinQ tunnel access
6.
port
Configure the QinQ tunnel uplink port to dot1Q-tunnel uplink mode
7.
(switchport dot1q-tunnel
Configure the QinQ tunnel uplink port to join the SPVLAN as a tagged
8.
member
Limitations for QinQ
The native VLAN for the tunnel uplink ports and tunnel access ports
◆
cannot be the same. However, the same service VLANs can be set on
both tunnel port types.
IGMP Snooping should not be enabled on a tunnel access port.
◆
If the spanning tree protocol is enabled, be aware that a tunnel access
◆
or tunnel uplink port may be disabled if the spanning tree structure is
automatically reconfigured to overcome a break in the tree. It is
therefore advisable to disable spanning tree on these ports.
This command sets the switch to operate in QinQ mode. Use the no form
dot1q-tunnel
to disable QinQ operating mode.
system-tunnel-
control
S
YNTAX
[no] dot1q-tunnel system-tunnel-control
D
EFAULT
Disabled
C
OMMAND
Global Configuration
C
OMMAND
QinQ tunnel mode must be enabled on the switch for QinQ interface
settings to be functional.
E
XAMPLE
Console(config)#dot1q-tunnel system-tunnel-control
Console(config)#
switchport dot1q-tunnel
(switchport allowed
(switchport native
vlan).
mode).
(switchport allowed
S
ETTING
M
ODE
U
SAGE
– 1115 –
C
36
HAPTER
Configuring IEEE 802.1Q Tunneling
tpid.)
vlan).
vlan).
| VLAN Commands
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