3-38
Cisco ASR 903 Router Hardware Installation Guide
OL-25178-05
Chapter3 Installing the Cisco ASR 903 Router
Connecting the Cisco ASR 903 Router to the Network
Connecting a Management Ethernet Cable
When using the Ethernet Management port in the default mode (speed-auto and duplex-auto) the port
operates in auto-MDI/MDI-X mode. The port automatically provides the correct signal connectivity
through the Auto-MDI/MDI-X feature. The port automatically senses a crossover or straight-through
cable and adapts to it.
However, when the Ethernet Management port is configured to a fixed speed (10 or 100 Mbps) through
command-line interface (CLI) commands, the port is forced to MDI mode.
When in a fixed-speed configuration and MDI mode:
•Use a crossover cable to connect to an MDI port
•Use a straight-through cable to connect to an MDI-X port
Warning
To comply with the Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety,
connect the Management Ethernet ports only to intra-building or unexposed wiring or cable. The
intrabuilding cable must be shielded and the shield must be grounded at both ends. The intra-building
port(s) of the equipment or subassembly must not be metallically connected to interfaces that connect
to the OSP or its wiring. These interfaces are designed for use as intra-building interfaces only (Type
2 or Type 4 ports as described in GR-1089-CORE) and require isolation from the exposed OSP cabling.
The addition of Primary Protectors is not sufficient protection in order to connect these interfaces
metallically to OSP wiring.
Installing and Removing SFP and XFP Modules
The Cisco ASR 903 Router supports a variety of SFP and XFP modules, including optical and Ethernet
modules. For information on how to install and remove SFP and XFP modules, see the documentation
for the SFP or XFP module at
http://www.cisco.com/en/US/partner/products/hw/modules/ps5455/prod_installation_guides_list.html
For information about inspecting and cleaning fiber-optic connections, see
http://www.cisco.com/en/US/partner/tech/tk482/tk876/technologies_white_paper09186a0080254eba.s
html
Caution We recommend that you wait 30 seconds between removal and insertion of an SFP on an interface
module. This time is recommended to allow the transceiver software to initialize and synchronize with
the standby RSP. Changing an SFP more quickly could result in transceiver initialization issues that
disable the SFP.
Connecting a USB Flash Device
To connect a USB flash device to the CiscoASR 903 Router, insert the memory stick in the USB port
labeled MEM. The Flash memory module can be inserted in only one way, and can be inserted or
removed regardless of whether the router is powered up or not.
Figure 3-26 shows the USB port connector on the CiscoASR 903 Router.