User's Manual

21-27
The packet with tag 1001 will be packed an external tag 1001 directly(This tag is unique in public network),
enter Broad Band Network-VLAN1001 and classfied to BRAS device. The packet with tag 2001(or 3001) will
be packed an external tag 2001(or 3001) and classfied to SR device according to the flow rules. The second
user can be assigned different VLAN tags for different VLANs in DSLAM2. Notice: The assigned VLAN tag of
the second user may be same with the first user and the packet with tag will be also packed an external tag. In
the above figure, the external tag of the second user is different to the first user for distinguishing DSLAM
location and locating the user finally.
The configuration in the following:
If the data flow of DSLAM1 enters the switch’s downlink port1, the configuration is as follows:
Switch(config)#class-map c1
Switch(config-classmap-c1)#match vlan 1001
Switch(config-classmap-c1)#exit
Switch(config)#class-map c2
Switch(config-classmap-c2)#match vlan 2001
Switch(config-classmap-c2)#exit
Switch(config)#class-map c3
Switch(config-classmap-c3)#match vlan 3001
Switch(config-classmap-c3)#exit
Switch(config)#policy-map p1
Switch(config-policymap-p1)#class c1
Switch(config-policymap-p1-class-c1)# set s-vid 1001
Switch(config-policymap-p1)#class c2
Switch(config-policymap-p1-class-c2)# set s-vid 2001
Switch(config-policymap-p1)#class c3
Switch(config-policymap-p1-class-c3)# set s-vid 3001
Switch(config-policymap-p1-class-c3)#exit
Switch(config-policymap-p1)#exit
Switch(config)#interface ethernet 1/0/1
Switch(config-if-ethernet1/0/1)#service-policy input p1