3Com 5112M-TPLS installation and operation guide Link Integrity, Module Security

If you set up redundancy between a secure port and a non-secure port (whether on a Security Module port or other module port), a warning message is displayed to terminal management. The warning informs you that this configuration has the potential to automatically cause a change in security when the primary port fails and the secondary port becomes activated.

Link Integrity

In general, enable Link Integrity for the Security Module to conform to the10BASE-T standard. Disable Link Integrity to connect to older equipment that does not conform to the 10BASE-T standard.

Enable Link integrity at both ends or disable Link Integrity at both ends of the connection. If one end of the connection is different, the module with Link Integrity enabled reports a Link Integrity error.

If you enable a port and disable Link Integrity, the Status LED for that port is on for 10 seconds and blinks off for 400 msecs to indicate that Link Integrity is disabled.

Enter the following management command to enable Link Integrity for all ports on the Ethernet module in slot 5.

ONline> set port 5.all link_integrity enable [ENTER]

Module Security

The Module Security DIP switch allows you to enable or disable security for the module. 3Com recommends that you leave this switch in its factory default setting (Off). This setting ensures that in the unlikely event of a concurrent failure of both the master management module and concentrator power, the Security Module ports will power up with ports disabled in a concentrator without network management.

Note: When the Security switch is set to enabled, port mode is set to disabled. Conversely, when the Security switch is set to disabled, port mode is set to enabled.

Installing and Operating the Module 3 - 15