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Split and Non-Split Mode for Power Supply and Fan Tray

4025561 Rev

247

Split and Non-Split Mode for Power Supply and

Fan Tray

This section explains the difference between Split and Non-Split mode reporting of

Prisma II EMS power supply and fan tray module parameters.

Overview

All Prisma II EMS system releases associate fan tray and power supply parameters

with chassis slot numbers. In System Release 1.00, all fan tray and power supply

parameters are associated with the slot number of the installed power supply

module or modules. Consequently, if Power Supply 1 and Power Supply 3 are both

installed, any alarm condition affecting the fan tray or either power supply module

is reported twice: once for chassis slot 1, and again for chassis slot 3.

To prevent duplicate alarms with both power supplies installed, this method of

reporting module parameters was changed beginning with System Release 1.01. The

fan tray, which previously had no physical chassis slot number assigned, was

defined as occupying chassis slot 0. This change allowed each fan tray or power

supply parameter to be associated with one and only one chassis slot number. As a

result, a System Release 1.01 or later chassis associates fan tray parameters with

chassis slot 0, power supply 1 parameters with chassis slot 1, and power supply 3

parameters with chassis slot 3.

The association of each fan tray and power supply parameter with only one chassis

slot number in System Release 1.01 is termed Split mode. Split mode is achieved

only when both the controlling ICIM2 and the fan tray in a chassis have System

Release 1.01 or later firmware. If either the controlling ICIM2 or the fan tray has

System Release 1.00 firmware, the chassis reports fan tray and power supply

parameters according to System Release 1.00 behavior, now termed Non-Split mode.

This scheme maintains backward compatibility for any chassis in which the fan tray

and controlling ICIM2 have different System Release firmware.

The following table summarizes the mode of reporting for each possible

combination of ICIM2 and fan tray firmware.

Fan Tray Firmware ICIM2 Rel 1.00 ICIM2 Rel 1.01 or later

System Release 1.00 Non-Split Non-Split

System Release 1.01 or later Non-Split Split

Note:

 The difference between the Non-Split behavior of Release 1.00 and the Split

behavior of later system releases is apparent in all product interfaces: the ICIM2

front panel, the CLI, and SNMP management information bases (MIBs) and

traps.

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Cisco GoQAM Informações Técnicas Página 271