3Com DUA3700-0BAA04 manual Need for a Redundant Switching Module

Redundant Switching Module 7-9

Redundant Switching Module

Need for a Redundant Switching Module

Identifying the Active Switching Module

This section covers the following topics:

Need for a Redundant Switching Module

Identifying the Active Switching Module

Conditions for Switch-over to Redundant module

Switching Module Configuration Database

￿Info Based on the MAC Address Resetting to Factory Defaults

A redundant switching module is a backup switching card that is capable of performing all the tasks of the currently active switching module should it fail. For this purpose, the redundant module’s data base is kept up-to-date with network parameters that are configured in the active switching module.

The redundant switching module is a necessary requirement in a critical-mission network. When a switch module fails in such a network, loss of data and interruption in transmission must be kept to an absolute minimum.

As the CoreBuilder 7000 boots, the first of the two switch modules to begin operating becomes the active switch module.

Once the unit has booted, the active switch module can be identified by the LMA command (1) SYS (4) SWM: or by the ACT LED as follows:

￿Active Switch: ACT LED flashes rapidly

Redundant Switch: ACT LED flashes once every 2 secs.

The redundancy feature works for any combination of the CoreBuilder 7000 and CoreBuilder 7000HD switch modules installed in the chassis.

Conditions for Switch-over to Redundant module

The switch-over to the redundant module will occur in the following situations:

Removal of the main switching module from the chassis.

￿Malfunction of the main switching module.

Manual reboot of the CoreBuilder 7000 by LMA, Telnet (soft reboot) or Transcend NMS.