SMC Networks SMC Tiger 10/100 SMC6128PL2 - Manual (Page 230)

Configuring the Switch
3-178
3
• Static trunk port groups are compatible with QinQ tunnel ports as long as the QinQ
configuration is consistent within a trunk port group.
• 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 3-178).
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 3-180.)
3. Create a Service Provider VLAN, also referred to as an SPVLAN (see “Creating
VLANs” on page 3-169).
4. Configure the QinQ tunnel access port to 802.1Q Tunnel mode (see “Adding an
Interface to a QinQ Tunnel” on page 3-180).
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 3-170).
6. Configure the SPVLAN ID as the native VID on the QinQ tunnel access port (see
“Configuring VLAN Behavior for Interfaces” on page 3-173).
7. Configure the QinQ tunnel uplink port to 802.1Q Tunnel Uplink mode (see
“Adding an Interface to a QinQ Tunnel” on page 3-180).
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 3-170).
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,