Allied Telesis AT-SBx81CFC960 - Manual (Page 26)

Chapter 1: Chassis and Power Supplies
26 Section I: Hardware Overview
Slots for the Ethernet Line and Controller Cards
The chassis has slots for four Ethernet line cards and two AT-
SBx81CFC960 Controller Cards, or five line cards and one controller card.
The slot definitions are predefined and may not be changed. Figure 7
identifies the slots.
Figure 7. Ethernet Line and Controller Cards Slots
Slots 1 to 4 are for the Ethernet line cards. The cards may be installed in
any order or variety in the slots.
Slot 5 is for the AT-SBx81CFC960 Controller Fabric Card. The chassis
must have a controller card. The Ethernet line cards do not forward traffic
if the chassis does not have a controller card. The controller card stores
the management software and configuration settings for the Ethernet line
cards and controls the backplane in the chassis, which the line cards use
to forward network traffic to each other. The backplane has a bandwidth of
up to 80 Gbps for each line card slot when the chassis has one controller
card.
Slot 6 has a dual function. You may use it with an Ethernet line card to add
more ports to the chassis or a second controller card to add controller card
redundancy and to increase the bandwidth of the backplane. The chassis
has a backplane bandwidth of up to 160 Gbps for each line card slot
where there are two controllers cards.
Slot 1 - Line Card
Slot 3 - Line Card
Slot 5 - Controller
Slot 2 - Line Card
Slot 4 - Line Card
Slot 6 - Line Card
or Controller Card Card