Ericsson ECN330, User Manual

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Configuring the ECN330-switch
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packet is equal to the port TPID and the inner tag is 0x8100, it is treated as
a double-tagged packet. If a single-tagged packet has 0x8100 as its TPID,
and port TPID is not 0x8100, a new VLAN tag is added and it is also treated
as double-tagged packet.
5. If the destination address lookup fails, the packet is sent to all member ports
of the outer tag's VLAN.
6. After packet classification, the packet is written to memory for processing as
a single-tagged or double-tagged packet.
7. The ECN330-switch sends the packet to the proper egress port.
8. If the egress port is an untagged member of the SPVLAN, the outer tag will
be stripped. If it is a tagged member, the outgoing packet will have two tags.
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.