Allied Telesis AT-8100S/24 User Manual
Chapter 1: Overview
34
SFP Slots
The switches have two slots for 100Mbps 100Base-FX or 1000Mbps
1000Base-SX/LX fiber optic transceivers. You may add transceivers to
connect the switches to other network devices over large distances, build
a high-speed backbone network between network devices, or connect
high-speed devices, such as servers, to your network.
1000Base-SX/LX fiber optic transceivers. You may add transceivers to
connect the switches to other network devices over large distances, build
a high-speed backbone network between network devices, or connect
high-speed devices, such as servers, to your network.
The switches support a variety of short and long distance, 100 and 1000
Mbps fiber optic SFP modules. For a list of supported SFP modules,
contact your Allied Telesis representative or visit our web site.
Mbps fiber optic SFP modules. For a list of supported SFP modules,
contact your Allied Telesis representative or visit our web site.
The two SFP slots are paired with the 10/100/1000Base-T ports to form
combo ports. The combo ports are listed in Table 8.
combo ports. The combo ports are listed in Table 8.
The rules for using the combo ports are listed here:
Only one port in a pair can be active at a time.
The twisted pair port is the active port when the companion SFP
slot is empty, or when an SFP module is installed but has not
established a link to an end node.
slot is empty, or when an SFP module is installed but has not
established a link to an end node.
The switch automatically deactivates the twisted pair port of a
combo port when the companion SFP module establishes a
network link.
combo port when the companion SFP module establishes a
network link.
The switch automatically reactivates the twisted pair port whenever
the companion SFP module loses its network link.
the companion SFP module loses its network link.
In nearly all cases, a twisted pair port and an SFP module share
the same configuration settings, including port settings, VLAN
assignments, access control lists, and spanning tree.
the same configuration settings, including port settings, VLAN
assignments, access control lists, and spanning tree.
An exception to the shared settings is port speed. If you disable
Auto-Negotiation on a twisted pair port and set the speed and
duplex mode manually, the speed reverts to Auto-Negotiation
when an SFP module establishes a link with an end node.
Auto-Negotiation on a twisted pair port and set the speed and
duplex mode manually, the speed reverts to Auto-Negotiation
when an SFP module establishes a link with an end node.
Table 8. Combo Ports
Model
10/100/1000
Base-T Port
Base-T Port
SFP Slot
AT-8100S/24C, AT-8100S/24,
AT-8100S/24POE, AT-8100S/
16F8-LC, AT-8100S/16F8-SC,
and AT-8100S/24F-LC
AT-8100S/24POE, AT-8100S/
16F8-LC, AT-8100S/16F8-SC,
and AT-8100S/24F-LC
25R
25
26R
26