Cabletron Systems EMM-E6 User Manual

Page 73

Setting Network Circuit Redundancy

5-5

Repeater Redundancy

By default, all ports are created as Inactive Backup ports. You should set one
port to be the Primary port and one port to be the Active port. Typically, the
same port is both Primary and Active but this is not required. To select primary
and active ports, click button 1 on a port to highlight it then click

;

select the same or another port and click

. Only one port can be

the Primary port and only one port can be Active at any one time; if you set a
different port to be Primary or Active, the original Primary or Active port
automatically resets to Backup/Inactive.

Once you have configured all the ports that compose the redundant circuit,
enable the circuit by clicking

To clear the settings in one circuit, highlight the Circuit Name that you want to
clear, and click on

To clear all redundancy configurations, click on

in the All Circuits

portion of the window. Reset does the following:

•

Deletes all entries in the Circuit Addresses box

•

Changes the status of every Circuit to Disabled

•

Reverts to previous Circuit Name(s)

•

Clears all module and port entries

NOTE

The Status of the Circuit Name must be set to Disabled when you configure the port list.

All backup ports will be disabled as soon as you enable the redundant circuit; the ports
remain disabled until they become active due to primary port failure. Ports cannot be
manually re-enabled until you have disabled and reset the circuit of which they were a
part. Backup ports which are part of a disabled circuit cannot be manually re-enabled.

NOTE

Be sure to make all physical connections to the backup ports once the redundant circuit
has been configured and enabled.

NOTE

After clearing redundancy settings by either method, backup ports remain disabled until
you manually reenable them so that data loops do not occur. Before you enable the ports,
disconnect their physical connections.