Ericsson EDN312 Guia do Utilizador descarregar pdf (Página 24)

Function Description

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

ends with either managed or unmanaged mode. In both modes End user

traffic will continue to flow. In the managed mode the IP DSLAM has an

IP addressed and can be managed from PEM (or through the ECN CLI). In

Unmanaged mode, the IP DSLAM does not have an IP address, and its

configuration cannot be changed. It uses the configuration stored in the

flash memory. When running in unmanaged mode the IP DSLAM cannot

use remote storage.

The running mode (Managed or Unmanaged) of the IP DSLAM is kept in a

section of the RAM that is not cleared at restart. This way the mode setting

survives a restart and can be tested by the BOOT loader. If the RAM has

lost its contents, for example after a sufficiently long power-off

(approximately 30 seconds), then the mode is set to Managed.

3.2.3.3 Application Software Download

The Boot SW is able to use either FTP or TFTP to download the

Application SW and configuration files (configuration file can only be

downloaded by TFTP). The protocol used for the Application SW download

is determined by the extension of the file. TFTP will be used if the extension

of the file is either “.tft” or “.tftp”. FTP will be used for any other extension.

3.2.3.4 Restarting the IP DSLAM

When an IP DSLAM is restarted the procedure is almost the same as when

it is initially powered up with the exception that the Application SW in Flash

will be compared to the Application SW on the Domain File Server.

If the files are identical the Application SW will be run from Flash. If the file

names are different the IP DSLAM will download the SW from the Domain

File Server. This procedure is illustrated in Figure 11 on page 21.

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Ericsson EDN312 Guia do Utilizador Página 24