•
Hot-swappable fan tray
•
Two bays for AC or DC power supplies
To provide redundant power to the router, you can install two AC power supplies, two DC power
supplies, or a combination of an AC and DC power supply.
Figure 6: E4G-400 Back Panel
1 = Slot A
3 = Fan tray
2 = Slot B
4 = Power supply bays
E4G-400 Combination Ports
The E4G-400 cell site aggregation router provides four 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.
The E4G-400 router supports 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 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 E4G-400 router follows these rules:
•
With both the SFP and 1000BASE-T interfaces connected on a combination port, only one interface
can be activated. The other is inactive.
•
If only one interface is connected, the router activates the connected interface.
•
The router determines whether the port uses the fiber or copper connection based on the order in
which the connectors are inserted into the router. When the router senses that an SFP and a copper
connector are inserted, the router enables the uplink redundancy feature. For example, if you first
connect copper ports 21 and 22, and then insert SFPs into optical ports 21 and 22, the router 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 router 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 User Guide
.
E4G-400 LEDs
The following tables describe the LEDs on the E4G-400 cell site aggregation router.
Extreme Networks E4G Series Routers
E4G Routers Hardware Installation Guide
16
