Extreme Networks Alpine 3802, Hardware Installation Manual

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74 Extreme Networks Consolidated "i" and "e" Series Hardware Installation Guide
Summit Switch Models
Figure 25: Power supply LEDs
Summit 300 Automatic Failover
The Summit 300 switches provide dual-media support on Gigabit Ethernet ports. On the Summit
300-24, ports 24 and 25 are Gigabit Ethernet ports that have redundant PHY interfaces, one mini-GBIC
and one 1000BASE-T connection for each port. On the Summit 300-48, ports 1:49 through 1:52 are
dual-mode redundant ports. Only one media type (fiber or copper) can be active at the same time on
those ports.
The two fiber ports and the last two of the 10/100/1000BASE-T ports on the Summit 300-24 and the
four fiber ports and the last four of the 10/100/1000BASE-T ports on the Summit 300-48 are designed as
combination ports for uplink redundancy. When sharing ports, only the fiber medium or only the
copper medium can be active at the same time. If copper medium 1 goes down while transmitting
packets, fiber medium 1X activates and becomes the primary link.
The switch determines whether the port uses the primary or redundant media based on the order in
which the connectors are inserted into the switch. When the switch senses that a mini-GBIC and a
copper connector are inserted, the switch enables the uplink redundancy feature. For example, if you
first insert mini-GBICs into ports 1:49 and 1:51 on the Summit 300-48, and then connect copper ports 1:1
and 1:3, the switch assigns ports 1:1 and 1:3 as redundant ports. On the Summit 300-24, if you insert a
mini-GBIC into port 24 and then an Ethernet cable connector into port 1, fiber becomes the primary
uplink port and port 1 becomes the redundant port.
Hardware determines when a link is lost and swaps the primary and redundant ports to maintain
stability. After a failover occurs, the switch keeps or sticks with the current port assignment until there
Table 14: Summit 300-48 power supply LED activity
Condition
IN LED
Indication TEMP LED
Indication OUT LED
Indication
Normal Green Off Green
Supply Inhibited or overloaded Green Off Off
Input AC Low or Missing Off Off Off
Fan Failure or Over Temperature Green Amber Off
LB48023