Installation manual

3-194
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• The native VLAN (VLAN 1) is not normally added to transmitted frames. Avoid using
VLAN 1 as an SPVLAN tag for customer traffic to reduce the risk of misconfiguration.
Instead, use VLAN 1 as a management VLAN instead of a data VLAN in the service
provider network.
• There are some inherent incompatibilities between Layer 2 and Layer 3 switching:
- Tunnel ports do not support IP Access Control Lists.
- Layer 3 Quality of Service (QoS) and other QoS features containing Layer 3
information are not supported on tunnel ports.
- Spanning tree bridge protocol data unit (BPDU) filtering is automatically disabled on
a tunnel port.
General Configuration Guidelines for QinQ
1. Configure the switch to QinQ mode (see “Enabling QinQ Tunneling on the Switch” on
page 3-194).
2. Set the Tag Protocol Identifier (TPID) value of the tunnel access port. This step is
required if the attached client is using a nonstandard 2-byte ethertype to identify
802.1Q tagged frames. The default ethertype value is 0x8100. (See “Adding an
Interface to a QinQ Tunnel” on page 3-195.)
3. Create a Service Provider VLAN, also referred to as an SPVLAN (see “Creating
VLANs” on page 3-184).
4. Configure the QinQ tunnel access port to 802.1Q Tunnel mode (see “Adding an
Interface to a QinQ Tunnel” on page 3-195).
5. Configure the QinQ tunnel access port to join the SPVLAN as an untagged member
(see “Adding Static Members to VLANs (VLAN Index)” on page 3-186).
6. Configure the SPVLAN ID as the native VID on the QinQ tunnel access port (see
“Configuring VLAN Behavior for Interfaces” on page 3-189).
7. Configure the QinQ tunnel uplink port to 802.1Q Tunnel Uplink mode (see “Adding an
Interface to a QinQ Tunnel” on page 3-195).
8. Configure the QinQ tunnel uplink port to join the SPVLAN as a tagged member (see
“Adding Static Members to VLANs (VLAN Index)” on page 3-186).
Enabling QinQ Tunneling on the Switch
The switch can be configured to operate in normal VLAN mode or IEEE 802.1Q (QinQ)
tunneling mode which is used for passing Layer 2 traffic across a service provider’s
metropolitan area network. You can also globally 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 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, if
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