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x610 Series Layer 3 Gigabit Ethernet Switches Installation Guide
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Follow these guidelines when using these ports and slots:
Only one port in a pair, either a 10/100/1000Base-T port or a
corresponding SFP module can be active at a time.
A 10/100/1000Base-T 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.
A 10/100/1000Base-T port automatically changes to the redundant
status mode when an SFP module establishes a link with an end node.
A 10/100/1000Base-T port automatically transitions back to the active
status when the link is lost on an SFP module.
In nearly all cases, a 10/100/1000Base-T port and an SFP module
share the same configuration settings, including port settings, VLAN
assignments, access control lists, and Spanning Tree Protocol
settings.
An exception to the shared settings is port speed. If you disable
Auto-Negotiation on an 10/100/1000Base-T 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.
The PoE+ power supplied from the 10/100/1000Base-T port is
unaffected by insertion of an SFP module in to the corresponding SFP
combo port.