Allied Telesis AT-S63 - Manual (Page 59)

AT-S63 Stack Command Line User’s Guide
Section I: Basic Operations 59
Redundant Twisted Pair Ports
The twisted pair ports 21R to 24R on the AT-9424Ts and AT-9424Ts/XP
Switches are paired with four SFP slots. Follow these guidelines when
using these ports and slots:
ˆ Only one port in a pair — either the twisted pair port or the
corresponding SFP module — can be active at a time.
ˆ The twisted pair port is the active port when its SFP slot is empty, or
when an 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 an 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 SFP module.
ˆ A twisted pair port and an SFP module share the same configuration
settings, including port settings, VLAN assignments, access control
lists, and spanning tree.
ˆ 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 a GBIC or SFP
module establishes a link with an end node.
ˆ Omit the letter “R” when specifying a redundant twisted pair port in a
command line command. For instance, the following command
assigns the description “Sales server” to port 23R on the AT-9424T/GB
Switch. The switch has the module ID 2:
set switch port=2.23 description=”Sales server”
Note
These guidelines do not apply to the XFP slots on the AT-9424Ts/XP
and AT-9448Ts/XP switches.