Allied Telesis Layer 3 Gigabit Ethernet Switch x600-24Ts/XP - Manual (Page 23)

x600 Series Layer 3 Gigabit Ethernet Switches Installation Guide
23
Redundant Twisted Pair Ports
Four of the twisted pair ports on the x600-24-Ts and x600-24-Ts/XP
switches are paired with SFP slots. The twisted pair ports are identified
with the letter “R” for “Redundant” as part of their number on the faceplate
of the unit. The ports and slots are listed in Table 2.
Follow these guidelines when using these ports and slots:
ˆ Only one port in a pair can be active at a time. It can be either the
twisted pair port or the corresponding SFP module.
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 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 Protocol
settings.
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 an SFP module
establishes a link with an end node.
Table 2. Twisted Pair Ports Matched with SFP Slots
Models Ports and Slots
x600-24Ts and
x600-24Ts/XP 21R with SFP slot 21
22R with SFP slot 22
23R with SFP slot 23
24R with SFP slot 24