Chapter 2 Rack-Mounting, Tabletop Installation, and Cabling

Attaching the Alarm Port Cable

Attaching the Alarm Port Cable

Figure 2-15 Connecting the Alarm Port Cable

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Alarm port

If you have an alarm system, attach the alarm cable to the Cisco 7401ASR router alarm port. The alarm port cable is not provided by Cisco Systems. Insert the cable connector into the alarm port. The cable connector cannot be incorrectly inserted into the alarm port.

The alarm port is used to monitor fatal or severe errors that cause Cisco IOS to crash. The alarm port is connected to a normally closed solid state relay. Cisco IOS writes to a hardware port and the relay contact opens. If the system enters into a ROMmon or watchdog reset state, the relay contacts close. The closing contacts alert the alarm annunciator or monitor that a Cisco IOS crash has occurred.

If interfaces fail or other non-fatal errors occur, the alarm port does not respond. Continue to use SNMP to manage these types of errors.

For alarm port specifications, see Appendix A, “Specifications,” the “Alarm Port” section on page A-9.

Using the Cable-Management Bracket

Figure 2-16 Securing Interface Cables through the Cable-Management Bracket

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Input/output cables

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Cable-management bracket

Secure port adapter interface cables and input/output cables by placing them through the cable-management bracket.

 

Cisco 7401ASR Installation and Configuration Guide

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OL-5419-01 B0

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Cisco Systems 7401ASR manual Attaching the Alarm Port Cable, Using the Cable-Management Bracket