________________________________________________ DS33X162/X161/X82/X81/X42/X41/X11/W41/W11
Rev: 063008
45 of 375
Figure 8-4. Forwarding Mode 2: One or Two Ethernet Port Forwarding with Scheduling
* Note that Forwarding Mode 2 is the only forwarding mode available in the DS33X11.
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
Receive
VCAT/LCAS
Processor
Decapsulator #1 WAN Trap
Ethern
et
M
A
C
2
LAN Extract
Queue
WAN Extract
Queue
LAN Insert
Queue
Encapsulator
1
LAN
Tra
p
WAN
Group 3 LAN Queue 12-P4
LAN Queue 11-P3
LAN Queue 10-P2
LAN Queue 9
Priority 1
QoS
Encapsulator
3
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 #3 WAN Trap
Frames from the
Ethernet Interfaces
are forwarded to
the WAN groups
based on physical
port, then
scheduled by
Priority (802.1p
or DSCP).
Frames toward
the Ethernet
Interface are
forwarded based
on the physical
port.