Vas Data Flow: From The Vas Server - Cisco SCE2020-4XGBE-SM Configuration Manual

VAS over 10G
The following is the sequence of steps in the VAS data flow from the subscriber side to the VAS server:
1.
2.
3.
4.
5.
6.

VAS Data Flow: From the VAS Server

Figure 12-9
Cisco SCE 2000 and SCE 1000 Software Configuration Guide
12-36
A subscriber packet is received at the 7600/6500 external 10G link.
The packet is marked with VLAN 100 at the access port and is sent towards the EtherChannel (EC)
configured with VLAN 100.
The EC selects port 1 of the SCE platform based on the subscriber side IP, and the VLAN tag is
stripped off (100 is the native VLAN tag in the 7600/6500 trunk port).
The SCE platform classifies the flow as VAS flow and tags it with the VAS server VLAN tag 505.
The packet is sent to the VAS server from SCE platform port 2 (N) towards the 7600/6500 with
VLAN tag 505.
The packet is received on the 7600/6500 trunk port and is sent to the access port configured with
VLAN 505, which is the port connected to the VAS server subscriber side.
The packet has no VLAN tag when it arrives at the VAS server.
Data Flow in VAS over 10G Topology: From the VAS Server
S
N
505
100
2
505,525
Native: 100
3
1-S
4
2-N
3-S
4-N
Chapter 12
VAS
1
525
7600
6
EC1 EC2
505,525
Native: 101
SCE
Value Added Services (VAS) Traffic Forwarding
S
N
101
7
5
1-S
2-N
3-S
4-N
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