________________________________________________ DS33X162/X161/X82/X81/X42/X41/X11/W41/W11
Rev: 063008
44 of 375
Figure 8-3. Forwarding Mode 1: Single Ethernet Port with Priority Forwarding
WAN
Group 1
Ethern
et
M
A
C
1
Serial
Port 1
LAN Queue 1
Priority 1
TRANSMIT:
The 16 Serial Ports
are assigned to the
four Encapsulator
WAN Groups with
VCAT.TCR3.TVGS
RECEIVE:
The 16 Serial Ports
are assigned to the
four Decapsulator
WAN Groups with
VCAT.RCR4.RVGS
Frames from the
Ethernet Interface
are forwarded to
the LAN Queues
based on Priority
(802.1p or DSCP).
WAN Ports
LAN Ports
WAN Insert
Queue
QoS
Bridge
/Filte
r
Scheduler
and
T
ransmit
VCAT/LC
AS
Processing
Receive
VCAT/LCAS
Processor
Decapsulator #1 WAN Trap
LAN Extract
Queue
WAN Extract
Queue
LAN Insert
Queue
Encapsulator
1
LAN
Tra
p
WAN
Group 2
LAN Queue 5
Priority 2
Encapsulator
2
WAN
Group 3
LAN Queue 9
Priority 3
Encapsulator
3
WAN
Group 4
LAN Queue 13
Priority 4
Encapsulator
4
Priority Lookup Table
Serial
Port 2
Serial
Port 3
Serial
Port 4
Serial
Port 5
Serial
Port 6
Serial
Port 7
Serial
Port 8
Serial
Port 9
Serial
Port 10
Serial
Port 11
Serial
Port 12
Serial
Port 13
Serial
Port 14
Serial
Port 15
Serial
Port 16
Decapsulator #2 WAN Trap
Decapsulator #3 WAN Trap
Decapsulator #4 WAN Trap
Frames toward
the Ethernet
Interface
are forwarded
based on the
order of
receipt.