Cisco SCE2020-4XGBE-SM - Page 348

12-34
Cisco SCE 2000 and SCE 1000 Software Configuration Guide
OL-7827-12
Chapter 12 Value Added Services (VAS) Traffic Forwarding
VAS over 10G
Figure 12-7 Data Flow in VAS over 10G Topology
VAS flows enter the SCE platform without a VLAN tag, and are then transmitted from the SCE platform
with the VLAN tag of the VAS server. They must return from the VAS server to the SCE platform with
this tag, which is then stripped off.
In the solution using the 7600/6500, VLAN tags are also used to identify the external link. Note that this
is not the same VLAN tag used for the VAS servers. This VLAN tag must be defined as native in the
trunk ports towards the SCE platforms, so that the external traffic arrives at the SCE platform without a
VLAN tag.
VAS server 1
SCE
7600 B
7600 A
N
EC2
S
NS
EC1
EC2EC1
3
SUBs
4
Net
SUBs
10G
10G
10G
10G
VLAN translation:
505->525, 506->526...
VLAN 100 is stripped
off (Native VLAN)
VAS traffic keep
the VLAN ID, non
VAS traffic get the
native VLAN - 101
Net
12
VAS server 1
LINK
RX
Cisco SCE 2000
Series
4xGBE
TX
RX
MM
T
X
L
INK
RX
TX
RX
MM
T
X
LI
NK
RX
TX
RX
MM
TX
LINK
RX
TX
RX
MM
TX
GB
E
-1
SUB
LINE
NET
P
WR B
S
T
ATUS
PW
R
A
BYPASS
10/1
00
/
1000
LIN
K
/
A
CT
I
VE
10/100/
1000
LINK/
ACTIV
E
G
B
E
-2
S
UB
L
INE
/
CA
S
C
A
DE
NE
T
AUX
C
ONSOLE
MNG 2
M
NG
1
SCE
34
SCE-B
No VLAN trans
SCE-A
12
LINK
RX
Cisco SCE 2000
Series
4xGBE
TX
RX
MM
TX
LINK
RX
TX
RX
MM
TX
LIN
K
RX
T
X
RX MM
T
X
L
INK
RX
TX
RX
M
M
TX
G
B
E-1
SUB
L
I
N
E
NET
PWR B
STAT
US
PWR A
BYP
ASS
10/
1
00/
1000
LINK/
A
CT
I
VE
10/100/
1000
LINK/
ACT
I
VE
GBE-2
S
UB
LINE/C
A
SCADE
NET
AUX
C
ON
SOLE
MNG 2
MNG 1
525 505
525
100 101
100 101
505
VAS server 2
Access port
Trunk port
NS
NS
VAS server 2
526 506
526 506
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