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SQinQ Configuration
SQinQ Overview
SQinQ (Selective QinQ) is based on QinQ technology and is the
abbreviation of Selective QinQ. Compared to ordinary QinQ, it en-
ables packets to be tagged with outer tags according to inner tag.
SQinQ uses same terms as QinQ to describe its features: Port
connected to Client Network is called Customer port. Port con-
nected to Service Provider Network is called Uplink port. Access-
ing equipment at the edge of Service Provider Network is called
PE (Provider Edge). Client Network is accessed to PE via Trunk
VLAN. Uplink Ports inside Service Provider Network are connected
via Trunk VLAN symmetrically. SQinQ is based on ACL function.
By matching specific ACL traffic rules in ports, SQinQ functions
can set different Service Provider's VLAN tags for packets. Packets
are transmitted in Service Provider Network. Vlan Tags of Service
Provider would be strip off when packets leave Service Provider
Vlan.
SQinQ configuration includes the following two steps:
1. Customer Port Strategy Configuration
Configure a group of customer vlans corresponding to one
uplink vlan. One port can configure multiple customer vlan
groups, but must make sure that vlan can't overlap in different
customer vlan groups on the same port.
Configuration of SQinQ in CustomerPort only makes sense for
packets which carrying 802.1Q tag and for designated Cus-
tomer Vlan. As to the Customer Vlan which carries 802.1P tag
or untag, It are all handled as normal Vlan.
Note:
SQinQ would not work in good condition when QinQ is already
configured. Reason is that port could not recognize Customer
Vlan Tag any more when QinQ is configured on this port. Con-
sequently, SQinQ would not get any Customer Vlan informa-
tion.
2. ISP vlan Configuration
It is necessary to operate Service Provider Network after Cus-
tomerPort configuration. Packets can be exchanged success-
fully. Configure all ports in Service Provider Network as Tag
Ports and all Customer Ports as Untag Ports. All the packets
exchanged in Service Provider Network carry two layers of Tag
which are Uplink Tag and Customer Tag. When packets leaving
Service Provider Network, there is only one layer of Tag left:
Customer Tag.
Confidential and Proprietary Information of ZTE CORPORATION
Chapter 7 Service Configuration
89
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