3Com 5104M-FL1 Implementing Backbone Cable Plant Fault Tolerance, Setting Redundancy

❑Remote Failure Signaling Configuration - If redundancy is enabled at the other end of the fiber link, you must enable remote failure signaling for all connecting 10BASE-FL Module ports.

Implementing Backbone Cable Plant Fault Tolerance

You can enable redundancy between two ports on the 10BASE-FL Module using either:

❑Network management module commands

❑A dip switch

This section describes:

❑Setting Redundancy

❑Remote Failure Signalling

Setting Redundancy

When you enable redundancy between two ports, the ports are automatically enabled. Port 1 (or 3) then becomes the primary link and port 2 (or 4) the redundant link. For maximum cable plant fault tolerance, connect both the primary and backup ports back to the central concentrator (Figure 2-10). This configuration allows the backup port to automatically take over if the primary link fails.

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