Edge Products ES3528-WDM - Manual (Page 209)

Configuring IEEE 802.1Q Tunneling
12-15
12
Configuration Limitations for QinQ
• The native VLAN of uplink ports should not be used as the SPVLAN. If the SPVLAN
is the uplink port's native VLAN, the uplink port must be an untagged member of
the SPVLAN. Then the outer SPVLAN tag will be stripped when the packets are
sent out. Another reason is that it causes none-customer packets will be forwarded
to SPVLAN.
• Static trunk port groups are compatible with QinQ tunnel ports as long as the QinQ
configuration is consistent within a trunk port group.
• QinQ and L2MPLS mode cannot be supported at the same time.
• The native VLAN (VLAN 1) is not normally added to transmitted frames. Avoiding
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:
- A tunnel port cannot be a routed port.
- 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 “Configuring the Switch for Normal
Operation or Tunneling Mode” on page 4-3).
2. Create a Service Provider VLAN, also referred to as an SPVLAN (see “Creating
VLANs” on page 12-6).
3. Configure the QinQ tunnel port to dot1Q tunnel port mode (see “Adding an
Interface to a QinQ Tunnel” on page 12-16).
4. Set the Tag Protocol Identifier (TPID) value of the tunnel port. This step is
required is the attached client is using a nonstandard 2-byte ethertype to identify
802.1Q tagged frames. The standard ethertype value is 0x8100. (See “Adding an
Interface to a QinQ Tunnel” on page 12-16.)
5. Configure the QinQ tunnel port to join the SPVLAN as an untagged member (see
“Adding Static Members to VLANs (VLAN Index)” on page 12-7).
6. Configure the SPVLAN ID as the native VID on the QinQ tunnel port (see
“Configuring VLAN Behavior for Interfaces” on page 12-10).
7. Configure system MTU to 1526 if jumbo frames are not enabled (see
“Configuring the Maximum Frame Size” on page 4-4).
8. Configure the QinQ uplink port to join the SPVLAN as a tagged member (see
“Adding Static Members to VLANs (VLAN Index)” on page 12-7).