________________________________________________ DS33X162/X161/X82/X81/X42/X41/X11/W41/W11
Rev: 063008
48 of 375
Figure 8-7. Forwarding Mode 5: Full LAN-to-WAN and WAN-to-LAN VLAN Forwarding
WAN
Group 1
LAN Queue 4-P4
LAN Queue 3-P3
LAN Queue 2-P2
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
WAN Ports
LAN Ports
WAN Insert
Queue
QoS
Bridge
/Filte
r
Scheduler
and
T
ransmit
VCAT/LC
AS
Processing
VLAN (VID)
Lookup Table
Receive
VCAT/LCAS
Processor
Decapsulator #1 WAN Trap
Ethern
et
M
A
C
2
LAN Extract
Queue
WAN Extract
Queue
LAN Insert
Queue
LAN
Tra
p
VLAN
Processing
WAN
Group 3
LAN Queue 8-P4
LAN Queue 7-P3
LAN Queue 6-P2
LAN Queue 5
Priority 1
QoS
WAN
Group 2 LAN Queue 12-P4
LAN Queue 11-P3
LAN Queue 10-P2
LAN Queue 9
Priority 1
QoS
WAN
Group 4 LAN Queue 16-P4
LAN Queue 15-P3
LAN Queue 14-P2
LAN Queue 13
Priority 1
QoS
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
VLAN
Processing
Decapsulator #3 WAN Trap
Frames from
MAC 1 are sent to
WAN groups 1 or 2
based on VID.
Frames from MAC 2
are sent to WAN
Groups 3 or 4. All
are scheduled
by Priority
(802.1p or
DSCP)
Frames
toward
the Ethernet
Interface are
forwarded based
on the VLAN TAG
Encaps
ulat
or
1
E
n
ca
p
su
la
to
r3
Note: Frames in
each pair of WAN
groups are
scheduled by a
round-robin
scheduler.