To maximize performance, choose one of these methods for configuring the Ethernet ports:
•
Let the ports autonegotiate both speed and duplex.
•
Set the port speed and duplex parameters on both ends of the connection.
SUMMARY STEPS
1.
When connecting to workstations, servers, and routers, connect a straight-through cable to an RJ-45
connector on the front panel.When connecting to routers or repeaters, use a crossover cable.
2.
Connect the other end of the cable to an RJ-45 connector on the other device. The port LED turns on when
both the router and the connected device have established link.
3.
Reconfigure and reboot the connected device, if necessary.
4.
Repeat Steps 1 through 3 to connect each device.
DETAILED STEPS
Step 1
When connecting to workstations, servers, and routers, connect a straight-through cable to an RJ-45 connector on the
front panel.When connecting to routers or repeaters, use a crossover cable.
You can use the
mdix auto
interface configuration command in the CLI to enable the automatic
medium-dependent interface crossover (auto-MDIX) feature. When the auto-MDIX feature is enabled, the router
detects the required cable type for copper Ethernet connections and configures the interfaces accordingly.
Therefore, you can use either a crossover or a straight-through cable for connections to a copper 100/1000, or
an SFP module port on the router, regardless of the type of device on the other end of the connection.
Note
Step 2
Connect the other end of the cable to an RJ-45 connector on the other device. The port LED turns on when both the
router and the connected device have established link.
If the port LED does not turn on, the device at the other end might not be turned on, or there might be a cable problem
or a problem with the adapter installed in the attached device.
On user network interface (UNI) ports, the port LED is green after the link is established.
Note
Step 3
Reconfigure and reboot the connected device, if necessary.
Step 4
Repeat Steps 1 through 3 to connect each device.
Connecting to SFP Modules
This section describes how to connect to SFP modules. For instructions on how to connect to fiber-optic SFP
modules, see the
Connecting to Fiber-Optic SFP Modules
section.
For instructions about how to install or remove an SFP module, see the
Installing and Removing SFP Modules
section.
Connecting to Fiber-Optic SFP Modules
Follow these steps to connect a fiber-optic cable to an SFP module:
Cisco ASR-920-12SZ-IM Aggregation Services Router Hardware Installation Guide
56
Installing the Cisco ASR 920 Series Router
Connecting to SFP Modules
