Step 4
If you are also connecting a redundant DC power supply, repeat these steps for the second power source.
When you connect a redundant DC power supply, ensure that each power supply is connected to a separate
power source. This prevents power loss during a failure.
Note
Service the DC Power Supply
Before you begin
Switch off the circuit breaker in your equipment area. As an extra precaution, tape the circuit-breaker switch
in the Off position.
Step 1
Slip on the ESD-preventive wrist strap that was included in the accessory kit.
Step 2
Switch the power supply circuit-breaker switch on the chassis to the Off (O) position.
Step 3
Pull the terminal block plug connector out of the terminal block head in the power supply.
Connect Gigabit Ethernet Ports
Gigabit Ethernet (GE) ports can be connected to other devices using either fiber optic or copper cables. The
choice depends on whether the communication distance between your devices is long or short.
If you choose fiber optic cables, connect suitable Small Form-factor Pluggable (SFP) modules. The device
supports various SFP and SFP+ modules, including optical and Ethernet modules. For information on how
to install and remove SFP and SFP+ modules, see the documentation for the SFP or SFP+ module at:
SFP and SFP+ Transceiver Module Installation Notes
. Select the port on the device where you insert the SFP
module.
If you choose copper cables, connect to an RJ-45 connector.
The device 10/100/1000 ports configure themselves to operate at the speed of devices to which they are
connected. By default, autonegotiation is enabled in the chassis. You can manually set the speed and the
duplex parameters. If the device to which the ports are connected does not autonegotiate, low performance
or no linkage may result.
To maximize performance, choose one of these methods for configuring the GE ports:
• Have ports autonegotiate both speed and duplex parameters.
• Set speed and duplex parameters on both ends of the connection.
Use the
mdix auto
command in the interface configuration mode to enable an automatic media-dependent
interface with crossover detection. After you enable the automatic media-dependent interface, the device
detects the required cable type for copper Ethernet connections and configures the interface accordingly. Then,
use either a crossover or a straight-through cable for connecting to a copper 10/100/1000 port. If the
mdix
auto
command fails to enable the interface, connect the cable through SFP modules.
Cisco ASR-920-12SZ-A and Cisco ASR-920-12SZ-D Aggregation Services Router Hardware Installation Guide
47
Install the Router
Service the DC Power Supply