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DES-7200 Configuration Guide Chapter 12 QinQ Configuration
12-28
Figure 9 C-Tag based flexible QinQ to realize Internet access service
12.3.2.2 Application requirements
Broadband Internet and IPTV traffic shall be identified by VLAN ID, so as to
apply different QoS service policies to different traffic.
12.3.2.3 Configuration tips
Configure C-Tag based flexible QinQ on MAN access layer switch's two
interfaces (G0/1 and G0/2 of Switch A) connecting with the corridor
convergence switches. The application requirements can be met by classifying
service traffic as per inner VLAN Tag.
Flexible QinQ VLAN label planning for adding S-Tag on the basis of C-Tag traffic
classification
Device Service
Inner VLAN
Tag
Outer VLAN
Tag
Traffic
classificati
on rule
Switch A
Broadband
Internet
101-200 101
C-Tag
VLAN range
Switch A IPTV 201-300 201
C-Tag
VLAN range
Note
QinQ-enabled device will encapsulate the outer Tag of other
VLAN for user packets and won't forward packets as per the
original VLAN in the packets. Therefore, there is no need to
create user's VLAN on the device.