Cisco Systems UBR-3X10 manual Hardware Component Descriptions, Power Supply Module, OIR Feature

Chapter 1 Cisco uBR-3x10 RF Switch Overview

Hardware Component Descriptions

OIR Feature

The OIR feature allows you to remove an Ethernet controller or an upstream or downstream module and replace it with another identically configured one. If the new controller or module matches the controller or module you removed, the system immediately brings it online. To allow OIR, an address allocator with a unique MAC address is stored in an EEPROM on the Cisco RF switch midplane. Each address is reserved for a specific port and slot in the switch, regardless of whether an Ethernet controller or an upstream or downstream switch module resides in that slot.

Slot MAC Addresses

The MAC addresses are assigned to the slots in sequence. The first address is assigned to Ethernet controller slot 0, and the next addresses are assigned to upstream and downstream card slots 1 through 14 (refer to the “Cisco uBR 3x10 RF Switch Slot Information” section on page 6-7for slot location information). This address scheme allows you to remove the Ethernet controllers or upstream and downstream cards and insert them into other switches without causing the MAC addresses to move around the network or be assigned to multiple devices.

Hardware Component Descriptions

The following components are included in the Cisco uBR 3x10 RF Switch chassis:

•Power supply module

•Ethernet controller module

•Upstream (low-frequency) switch modules

•Downstream (high-frequency) switch modules

Power Supply Module

•Cisco part number 74-2624-01 (see Figure 1-3 on page 1-5).

The power supply module takes 100 to 240 VAC input and provides +12 VDC output. It also takes -40.5 to -72 VDC input and supplies +12 VDC output.

A control switch on the front panel is used to select DC input or AC input operation. This a 20-W power supply.

Caution When inserting or removing the power supply from the Cisco uBR 3x10 RF Switch chassis, you must use a screwdriver to tighten and loosen the captive installation screws.

Cisco uBR-3x10 RF Switch Hardware Installation and Cabling Guide

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