HP Cisco MDS 9134 Cisco MDS 9000 Family Fabric Manager Configuration Guide, Re - Page 663

Chapter 34 Managing FLOGI, Name Server, FDMI, and RSCN Databases RSCN Send documentation comments to [email protected] Figure 34-5 RSCN Multi-PID Step 3 Step 4 Check the Enable check box. Click Apply Changes to save these changes, or click Undo Changes to cancel any unsaved changes. Clearing RSCN Statistics You can clear the counters and later view the counters for a different set of events. For example, you can keep track of how many RSCNs or SW-RSCNs are generated on a particular event (like ONLINE or OFFLINE events). You can use these statistics to monitor responses for each event in the VSAN. To clear the RSCN statistics for the specified VSAN, refer to the Cisco MDS 9000 Family CLI Configuration Guide. RSCN Timer Configuration Distribution Using CFS Because the timeout value for each switch is configured manually, a misconfiguration occurs when different switches time out at different times. This means different N-ports in a network can receive RSCNs at different times. Cisco Fabric Services (CFS) alleviates this situation by automatically distributing configuration information to all switches in a fabric. This also reduces the number of SW-RSCNs. RSCN supports two modes, distributed and nondistributed. In distributed mode, RSCN uses CFS to distribute configuration to all switches in the fabric. In nondistributed mode, only the configuration commands on the local switch are affected. Note All configuration commands are not distributed. Only the rscn event-tov tov vsan vsan command is distributed. The RSCN timer is registered with CFS during initialization and switchover. For high availability, if the RSCN timer distribution crashes and restarts or a switchover occurs, it resumes normal functionality from the state prior to the crash or switchover. OL-16184-01, Cisco MDS SAN-OS Release 3.x Cisco MDS 9000 Family CLI Configuration Guide 34-7