Ericsson EDN312 Betriebsanweisung PDF herunterladen (Seite 15)

Function Description

4/1553-HSC 901 101/2 Uen B 2009-02-27

A fan changes state from Good or Poor to Failed if the rotation speed of

the fan in rpm, after 30 seconds of running at full speed level, is below

Threshold 1.

A fan changes state from Failed to Poor if the rotation speed of the fan in

rpm is above Threshold 2 and from Failed to Good if the Poor if the rotation

speed of the fan in rpm is above Threshold 4.

A fan changes state from Poor to Good if the rotation speed of the fan in

rpm is above Threshold 4.

Note: If both fans fail the EDN312 will send a Critical Alarm, which is

ceased when at least one of the fans is not in the failed state any

more.

3.1.2 Upgrading SW in EXN104 and ESN108 Nodes

The EXN104 FE-E1 converter and the ESN108 switch both contain two

types of software modules, that is, the boot SW and the application SW.

In the following the SW upgrading process is described in details. The two

nodes are, in practice, upgraded through PEM, or alternatively through the

ECN330 or ECN320 depending on which of the controller nodes that has

been used in the EDA system to control the nodes.

For information on how to use PEM to upgrade the application and boot

software in EDA nodes, both stand-alone and embedded nodes, the

operator should consult the Update Description for Windows Platform or

Update Description for Solaris Platform, and the ECN User Guide. The

Network Configuration Guide, which is one of the PEM guides, also

describes the upgrade procedure in some details.

From a theoretical point of view both software modules, application and

boot software, can be upgraded remotely using SNMP commands. The

boot SW is stored in one single flash area and will be replaced when

upgrading. The application SW is stored in an active and passive flash area

allowing a secure upgrade procedure.

When an application SW upgrade has been ordered through DHCP, the

node downloads the SW module from the Domain File Server, using a

TFTP server, and stores the SW in the passive flash area, see Figure 6 on

page 12. By using a header pointer the role of the two areas are swapped,

which means that the former passive area is changed to become the active

area and the former active area is changed to become the passive area.

Next step is to reboot and the node will now restart with the latest

downloaded version of the application SW.

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Ericsson EDN312 Betriebsanweisung Seite 15