Combination Ports And Failover - Extreme Networks Summit X150 Series Hardware Installation Manual

Combination Ports and Failover

Summit family switches provide two, four, or twelve uplink ports implemented as combination ports
that pair a copper port using RJ-45 connectors with an optical port using LC connectors. The copper
port operates as an autonegotiating 10/100/1000BASE-T port. The optical port allows Gigabit Ethernet
uplink connections through Extreme Networks small form factor pluggable (SFP) interface modules. See
the individual switch descriptions for the port numbers of the combination ports on each switch model.
Summit family switches support automatic failover from an active fiber port to a copper backup or
from an active copper port to a fiber port. If one of the uplink connections fails, the Summit uplink
connection automatically fails over to the second connection. To set up a redundant link on a
combination port, connect the active 1000BASE-T and fiber links to both the RJ-45 and SFP interfaces
of that port.
Gigabit Ethernet uplink redundancy on the Summit family switches follows these rules:
With both the SFP and 1000BASE-T interfaces connected on a combination port, only one interface
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can be activated. The other is inactive.
If only one interface is connected, the switch activates the connected interface.
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The switch determines whether the port uses the fiber or copper connection based on the order in
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which the connectors are inserted into the switch. When the switch senses that an SFP and a copper
connector are inserted, the switch enables the uplink redundancy feature. For example, if you first
connect copper ports 25 and 26 on a Summit X250e-24t switch, and then insert SFPs into ports 25
and 26, the switch assigns the copper ports as active ports and the fiber ports as redundant ports.
Hardware identifies when a link is lost and responds by swapping the primary and redundant ports to
maintain stability. After a failover occurs, the switch keeps the current port assignment until another
failure occurs or a user changes the assignment using the CLI. For more information about configuring
automatic failover on combination ports, see the ExtremeXOS Concepts Guide.
Summit Family Switches Hardware Installation Guide
Overview of the Summit Switches
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