Cisco Nexus 5000 Series Switch Fabric Manager Software Configuration Guide, NX-OS 4.0 (OL-16598-01, June 2008)

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19-5
Nexus 5000 Series Switch Fabric Manager Software Configuration Guide
OL-16598-01
Chapter 19 Managing FLOGI, Name Server, FDMI, and RSCN Databases
RSCN
RSCN
The Registered State Change Notification (RSCN) is a Fibre Channel service that informs hosts about
changes in the fabric. Hosts can receive this information by registering with the fabric controller
(through SCR). These notifications provide a timely indication of one or more of the following events:
• Disks joining or leaving the fabric
• A name server registration change
• A new zone enforcement
• IP address change
• Any other similar event that affects the operation of the host
This section includes the following topics:
• About RSCN Information, page 19-5
• Displaying RSCN Information, page 19-5
• About the multi-pid Option, page 19-6
• Configuring the multi-pid Option, page 19-6
• Configuring the multi-pid Option, page 19-6
• Configuring the multi-pid Option, page 19-6
• Clearing RSCN Statistics, page 19-7
• RSCN Timer Configuration Distribution Using CFS, page 19-7
• Configuring the RSCN Timer with CFS, page 19-8
About RSCN Information
A switch RSCN (SW-RSCN) is sent to registered hosts and to all reachable switches in the fabric.
Note The switch sends an RSCN to notify registered nodes that a change has occurred. It is up to the nodes to
query the name server again to obtain the new information. The details of the changed information are
not delivered by the switch in the RSCN sent to the nodes.
Displaying RSCN Information
To display RSCN information using Fabric Manager, perform this task:
Step 1 Expand a fabric, expand a VSAN, and then choose Advanced.
You see the VSAN advanced configuration in the Information pane.
Step 2 Click the RSCN Reg tab or the RSCN Statistics tab (see Figure 19-4).
You see the RSCN Statistics pane as shown in Figure 19-4.