14-3
Cisco SCE 8000 10GBE Software Configuration Guide
OL-30621-02
Chapter 14 Value-Added Services (VAS) Traffic Forwarding
How VAS Traffic Forwarding Works
How VAS Traffic Forwarding Works
Subscribers are provisioned to the VAS services as part of the normal provisioning process of new
subscribers to SCA BB.
When VAS traffic forwarding is enabled (
), in addition to all its basic functions, the SCA BB
application classifies each flow as either a VAS flow or as a standard flow (non-VAS flow).
Flows that are classified to a VAS service get the usual SCA BB service in addition to being forwarded
to the VAS servers for additional service. Traffic is processed first by the SCA BB application and then
forwarded to the VAS servers.
Traffic is routed to the VAS servers using VLAN tags to identify the traffic flows.
Figure 14-1
Typical VAS Traffic Forwarding Installation
VAS traffic forwarding guidelines:
•
A single Cisco SCE 8000 platform can support up to 64 VAS servers.
•
A maximum of 64 Cisco SCE 8000 platforms can be connected.
•
A maximum of eight VAS server groups is supported.
•
The same VAS server may be used by more than one Cisco SCE platform.
Note
In VAS mode, the Cisco SCE performance envelope might be up to 50 percent lower than in the normal
operation mode. The exact performance envelope is specific to the traffic mix in the customer network
and should be sized in advance.
LINK RX
Cisco SCE 20
00
Series
4xGBE
TX
RX
MM
TX
LINK RX TX
RX
MM
TX
LINK RX TX
RX
MM
TX
LINK RX TX
RX
MM
TX
GBE-1
SUB
LINE
NET
PWR B STAT
US
PWR A
BYPASS
10/100/
1000
LINK/
ACTIVE
10/100/
1000
LINK/
ACTIVE
GBE-2
SUB LINE/CA
SCADE NET
AUX
CONSOLE
MNG 2
MNG 1
VAS Servers
SCE
Subscribers
Network
157202