Allied Telesis AT-S63 - Manual (Page 49)

AT-S63 Management Software Features Guide
49
Redundant Twisted Pair Ports
Several AT-9400 Switches have twisted pair ports and GBIC or SFP slots
that are paired together. The twisted pair ports are identified with the letter
“R” for “Redundant” as part of their number on the front faceplate of the
unit. The switch models with paired ports and slots are listed in Table 20.
Follow these guidelines when using these ports and slots:
ˆ Only one port in a pair — either the twisted pair port or the companion
GBIC or SFP module — can be active at a time.
ˆ The twisted pair port is the active port when its GBIC or SFP slot is
empty, or when a GBIC or SFP module is installed but has not
established a link to an end node.
ˆ The twisted pair port automatically changes to the redundant status
mode when a GBIC or SFP module establishes a link with an end
node.
ˆ A twisted pair port automatically transitions back to the active status
when the link is lost on the GBIC or SFP module.
ˆ A twisted pair port and a GBIC or SFP module share the same
configuration settings, including port settings, VLAN assignments,
access control lists, and spanning tree.
ˆ The only exception to 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 a GBIC or
SFP module establishes a link with an end node.
Table 20 Twisted Pair Ports Matched with GBIC and SFP Slots
Model Ports and Slots
AT-9424T/GB 23R with GBIC slot 23
24R with GBIC slot 24
AT-9424T/SP 23R with SFP slot 23
24R with SFP slot 24
AT-9424T, AT-9424T/POE,
AT-9424Ts and
AT-9424Ts/XP 21R with SFP slot 21
22R with SFP slot 22
23R with SFP slot 23
24R with SFP slot 24
AT-9448T/SP 45R with SFP slot 45
46R with SFP slot 46
47R with SFP slot 47
48R with SFP slot 48