Displaying Fdmi; Rscn; About Rscn Information; Displaying Rscn Information - Cisco AP775A - Nexus Converged Network Switch 5010 Configuration Manual

Displaying FDMI

• Host operating system (OS) name and version number
All FDMI entries are stored in persistent storage and are retrieved when the FDMI process is started.
Displaying FDMI
The following example shows how to display all HBA details for a specified VSAN:
switch# show fdmi database detail vsan 1

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 a State
Change Registration (SCR) request). 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

About RSCN Information

A switch RSCN (SW-RSCN) is sent to registered hosts and to all reachable switches in the fabric.
The switch sends an RSCN to notify registered nodes that a change has occurred. It is up to the nodes to
Note
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

The following example shows how to display registered device information:
switch# show rscn scr-table vsan 1
The SCR table is not configurable. It is populated when hosts send SCR frames with RSCN information.
Note
If hosts do not receive RSCN information, then the show rscn scr-table command will not return entries.

About the multi-pid Option

If the RSCN multi-pid option is enabled, then RSCNs generated to the registered Nx ports may contain more
than one affected port IDs. In this case, zoning rules are applied before putting the multiple affected port IDs
together in a single RSCN. By enabling this option, you can reduce the number of RSCNs. For example, you
have two disks (D1, D2) and a host (H) connected to switch 1. Host H is registered to receive RSCNs. D1,
Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
596
Managing FLOGI, Name Server, FDMI, and RSCN Databases
OL-16597-01