Allied Telesis AT-SBx81CFC960 - Manual (Page 70)

Chapter 3: AT-SBx81CFC960 Controller Fabric Card
70 Section I: Hardware Overview
SFP+ Slots
The controller card has four SFP+ slots on the front panel. The slots are
numbered 1 to 4 and have the following functions.
 The slots may be used with standard 10Gbps transceivers to add
high speed uplink ports to the Ethernet line cards in the chassis.
For a list of supported transceivers, refer to the Allied Telesis web
site.
 The slots may be used with AT-Stack transceivers and the
VCStack Plus feature to create a stack of two chassis that operate
as a single, virtual switch. For more on stacking, refer to Chapter
14, “VCStack Plus Overview” on page 269.
Here are the SFP+ slot guidelines:
 The slots on the controller card support standard 10Gbps
transceivers when the VCStack Plus feature is disabled, which is
the default setting.
 The slots support only AT-Stack transceivers when the VCStack
Plus feature is enabled.
 The slots do not support combinations of standard 10Gbps and
stacking transceivers.
 When a chassis has two controller cards, the SFP+ ports on both
cards are active. Consequently, a chassis with two controller cards
has eight active SFP+ slots. This is true whether you are using the
slots with standard 10Gbps transceivers to add high speed uplink
ports to the chassis or with AT-Stack transceivers and the VCStack
Plus feature to build a stack of two chassis.
 You may use the slots in any order when you are using them with
standard 10Gbps transceivers.
 The cabling configurations for the SFP+ slots and stacking
transceivers are given in “Cabling Configurations for the Stacking
Transceivers” on page 273.
Each SFP+ slot has one LED. The states of the LED are described in
Table 19 on page 71.