Cabling for System
Management, Alarms, and Network Clocking
The multishelf system
supports several options for system management connections, and it provides
connections for triggering external alarms and controlling optical cable
clocking. A console port connection must be established before the system can
be configured and become operational. The optional external alarm and network
clocking features can be cabled at any time.
describes the following cabling options:
Although some of
the cabling described in this chapter is used to control the router, the
control network is a separate cabling component and is described in
Cabling the Control Network Using 22-Port Shelf Controller Gigabit
Ethernet Cards chapter.
configuration of an RP coupled with a 22-port SCGE card takes place through the
console port. Although these devices have Ethernet ports, the Ethernet ports
cannot be used until they are configured. The 22-port SCGE card in the FCC has
a console port, but because the multishelf system is configured on an RP, the
console port on the 22-port SCGE card is generally used only for
To connect to any of
the console ports in the multishelf system, use a rollover cable with an RJ-45
connector on the end that connects to the multishelf system component.
Typically, the other end of the rollover cable also uses an RJ-45 connector.
The other end of the rollover cable may connect to a terminal, computer running
terminal emulation software, or terminal server. Adapters are available to
connect the RJ-45 connector on the rollover cable to a variety of serial ports.
For more information on rollover cables and connectors, see the following web
For information on
connecting to the console port on an RP, see
Cisco IOS XR Getting
Started Guide .
Auxiliary Port Cabling
Auxiliary ports are provided on the RP and SCGE (2-port or 22-port) cards for remote connections through modems. RP auxiliary ports can be used to configure the multishelf system. As with the console port, the SCGE auxiliary port is typically used for troubleshooting.
The typical connection to the auxiliary ports uses a serial cable with RJ-45 connectors at each end. As with the rollover cable, adapters are available to connect the RJ-45 connector at the other end to a variety of serial port types. Cisco IOS XR Getting Started Guide
provides illustrations that show how RP auxiliary ports are connected through modems to a remote terminal.
Management Ethernet Port Cabling
Each RP provides a Management Ethernet port that can be used to manage the RP through an Ethernet network. This port can also be used to download software to RPs in the multishelf system or transfer files to remote servers for analysis or backup storage.
The typical connection to the Management Ethernet port uses an Ethernet cable with RJ-45 connectors at each end. The other end of the cable typically connects to an Ethernet switch, hub, or router that provides connectivity between the multishelf system and networks from which system management is desired.
For information on connecting to the Management Ethernet port on an RP, see Cisco IOS XR Getting Started Guide
Alarm Module Alarm-Out Cabling
Each AC or DC power shelf in LCCs and FCCs contains an alarm module that monitors the status of the power shelf and provides an external interface for system alarms. The same alarm module is used in all power shelves. For more information on alarm module connections, see the following documents:
Cisco CRS Carrier Routing System Multishelf System Description
Cisco CRS Carrier Routing System 16-Slot Line Card Chassis System Description
What to Do Next
When you have completed the cabling connections described in this chapter, document these connections and forward them to the people who will configure the system. For example, if you have cabled the console port to a terminal server so that people can access the console port from a network, they need the IP address of the terminal server and corresponding port number before they can use the console port.