Combo Ports 25 To 28 - Allied Telesis AT-9000/28 Command Line User's Manual

Combo Ports 25 to 28

Section I: Getting Started
Ports 25 to 28 on the AT-9000/28 and AT-9000/28SP Managed Layer 2
ecoSwitches are combo ports. Each combo consists of one 10/100/
1000Base-T port and one SFP slot. The twisted pair ports have the letter R
for Redundant as part of their port numbers on the front faceplates of the
units.
Here are the guidelines to using these ports and slots:
Only one port in a pair — either the twisted pair port or the companion
SFP module — can be active at a time.
The twisted pair port is the active port if the SFP slot is empty, or if an
SFP module is installed but does not have a link to a network device.
The twisted pair port automatically changes to the redundant status
mode when an SFP module establishes a link with a network device.
A twisted pair port automatically transitions back to the active status
when a link is lost on an SFP module.
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 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 an SFP
module establishes a link with an end node.
Note
These guidelines do not apply to the SFP slots on the AT-9000/52
Managed Layer 2 ecoSwitch.
AT-9000 Switch Command Line User's Guide
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