Ericsson EDN312 Betriebsanweisung PDF herunterladen (Seite 20)

Function Description

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

enabled. The EDN312x detects the active ECN by the valid DHCP offer,

and uses only that link. If the link becomes inactive, or the uplink from the

active ECM320 is down, the EDN312x will switch over to the other link (on

basis of the RSTP). The EDN312x will keep its IP address as long as the

DHCP lease is valid. If the DHCP lease expires while the connection to the

active ECN is still down, the EDN312x will restart in an unmanaged mode.

As long as the EDN312x is using the standby ECN, remote storage is not

used.

When the active ECN is up again, the EDN312x will switch back to it. If the

EDN312x was in an unmanaged mode, it will restart. If it still has a valid IP

address, the switchover will be without a restart.

Note: The IP DSLAM may be powered from the standby ECN, while all

the traffic goes through the link to the active ECN.

3.2.2 IP DSLAM SW Architecture

The IP DSLAM uses four main SW elements:

• Reset SW

• Boot SW

• Application SW

• Configuration File

All four elements are saved in the non-volatile memory (Flash) of the IP

DSLAM. The configuration file is only used for emergency cases when the

DHCP Server or Domain File Server is unavailable.

The application SW and configuration file are installed on the Management

Server. The Domain File Servers stores all the applications, configuration

files and DHCP data of the IP DSLAM (Remote Storage, see section 3.2.7

on page 27, in an Access Domain, see the PEM User Guides for more

information).

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 51 52

Keine Kommentare

Ericsson EDN312 Betriebsanweisung Seite 20