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Chapter 12
Value Added Services (VAS) Traffic Forwarding
•
Figure 12-3
the subscriber works in exactly the same way, but is received on the network port (N) and transmitted on
the subscriber port (S).
Figure 12-3
Non-VAS Data Flow
The flow steps for a non-VAS flow are:
•
•
•
OL-7827-12
Each line represents a flow
Thick line is a non-VAS flow
–
Thin line is a VAS flow
–
Black line indicates part of a flow that does not have VLAN tag
–
Red line indicates part of a flow that has a VLAN tag
–
illustrates the data flow from the subscriber to the network. Data flow from the network to
Data Flow in a VAS System
1-S
2-N
3-S
4-N
S
N
No VAS
VAS (without VLAN)
VAS (with VLAN)
A subscriber packet is received at the SCE platform port 1 (S).
The SCE platform classifies the flow as non-VAS flow.
The packet is sent to the network on port 2 (N).
SCE
1-S
2-N
3-S
4-N
VAS
S
N
Cisco SCE 2000 and SCE 1000 Software Configuration Guide
How VAS Traffic Forwarding Works
12-7
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