Rsp Modules - Cisco ASR 903 Quick Start Manual

Aggregation services router

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Fan Tray

The fan tray has the following hardware features:

• It provides side-to-side forced air cooling

• It provides redundant fans

• It is field replaceable

• It contains status LEDs

• It contains an alarm port with four external alarm inputs

Dust Filter (A903-FAN-F)

The dust filter (see Figure 1-7 ) on the fan tray is a quadrafoam 45PPI filter which is 85 percent dust resistant. A dummy cover

(A903-FAN-F-B) secures the dust filter in the chassis. For installing the fan filter, see Installing the Dust Filter .

Note

Use the pull tab provided to easily access the filter.

Air Plenum

Air Plenum or air baffle assembly (see Figure 3-7 ) is used change the air flow pattern of the unit. When the router is installed with

the plenum, the air flow pattern is changed from side-side to front-back. The air flow front-back pattern provides a rack installation

bay with a cool front zone and hot rear zone.

When the air plenum and the fan filter are installed in the chassis, the system operating temperature is

Note

limited to 55 degrees Celsius.

The air plenum is available from GAW (www.GawTechnology.net). To order an air plenum, contact the Sales and Marketing support

staff at GAW.

RSP Modules

The Cisco ASR 903 Router is designed to use up to two RSP modules to handle the data plane, network timing, and control plane

functionalities for the router. The RSP configuration allows you to use Cisco IOS software to control chassis management, redundancy,

external management, and system status indications on the router.

RSP features include:

• Loading software onto processor-based interface modules

• Redundant RSP management—The RSP manages detection of RSPs, exchange of health and status information, role negotiation,

function for detection, health and status exchange, role negotiation

• Packet processing

• Traffic management, including buffering, queuing, and scheduling, Ethernet MAC functions

• Network clocking functions including phase and time-of-day for BITS, 1 PPS, 10 MHz, and 1588 PTP clock references.

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Asr 903u