Managing Flogi, Name Server, Fdmi, And Rscn Databases; About Flogi; Flogi Scale Optimization - Cisco MDS 9000 Series Configuration Manual

Managing FLOGI, Name Server, FDMI, and RSCN
Databases
This chapter describes the fabric login (FLOGI) database, the name server features, the Fabric-Device
Management Interface, and Registered State Change Notification (RSCN) information provided in the Cisco
MDS 9000 Family. It includes the following sections:
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About FLOGI

In a Fibre Channel fabric, each host or disk requires an Fibre Channel ID. Use the show flogi database
command to verify if a storage device is displayed in the FLOGI table as in the next section. If the required
device is displayed in the FLOGI table, the fabric login is successful. Examine the FLOGI database on a
switch that is directly connected to the host HBA and connected ports.

FLOGI Scale Optimization

The FLOGI scale optimization feature enables MDS switches to support an increased number of FLOGIs for
module and chassis. The FLOGI scale optimization preloads the routing information for devices after a switch
or module reload. This can speed up the Accepts to FLOGIs. This feature is supported on all MDS switches,
except Cisco MDS 9250i Multiservice Fabric Switch and Cisco MDS 9148S 16G Multilayer Fabric Switch,
and is enabled by default, starting from Cisco MDS NX-OS Release 8.1(1). As of Cisco MDS Release 8.2(2),
the higher FLOGI scale limits are published only for MDS 9718. For more information see the
NX-OS Configuration
About FLOGI, on page 209
Name Server , on page 213
FDMI, on page 219
Displaying FDMI, on page 219
VMID, on page 221
RSCN , on page 228
Default Settings, on page 237
Enabling Port Pacing , on page 238
Limits" documentation for the FLOGI limits.
C H A P T E R
Cisco MDS 9000 Series Fabric Configuration Guide, Release 8.x
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