Battery Backup Mode; Bbu Capacity; Router Configuration; Universal Interface Module (Uim) Operation - Cisco Catalyst IR8140 Heavy Duty Series Hardware Installation Manual

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Installing Battery Backup Units

Battery Backup Mode

This section describes the impact on the router configuration and operating capabilities when the router

switches from AC power to BBU power.

The router supports up to three BBUs at one time. You should install as many BBUs as needed, up to three,

to meet your emergency power requirements.

If all installed batteries fully discharge while providing backup power to the router, the router will send a

dying gasp message and then shut down.

The router software configuration is not impacted when the router switches from AC power to BBU power.

By default, the Universal Interface Modules (UIMs) installed in slots continue to operate normally when the

router switches from AC power to BBU power.

You can configure the router to automatically power off specific modules when the router switches to BBU

power.

This section contains information about the BBU status and condition during the BBU lifecycle and how to

approach and manage it.

• Shelf life—Shelf life is the length of time before a BBU needs to be recharged in order to avoid BBU

• State of charge—State of charge (SOC) is the amount of charge on a battery and it is expressed as a

The BBU shipping and receiving guidelines define the BBU SOC status and how it can be managed at this

stage of the BBU life cycle:

• Cisco ships BBUs with a minimum of 60% SOC from the Cisco contract manufacturer (CM).

• Each BBU should have a minimum SOC of 50% upon receipt from the Cisco CM.

over-discharge.

percentage value. For example, an SOC of 100% represents a battery that is fully charged, and an SOC

of 0% represents a battery that is fully discharged.

Cisco Catalyst IR8140 Heavy Duty Series Router Hardware Installation Guide

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