Cisco MDS 9000 Series Configuration Guide

FLOGI Quiesce Timeout
The FLOGI Quiesce Timeout feature causes the FLOGI process to delay notifications to the other Fibre
Channel services such as Routing Information and Fibre Channel Name Server when a device logs out from
a fabric or when an interface goes down. If the device logs back to the fabric within the FLOGI quiesce timeout
value, the FLOGI Accept can be immediately returned without the other Fibre Channel services being notified.
This feature must be disabled by setting the timeout value to zero when there are devices in the fabric that
can share a pWWN at different times by logging into different switches within the fabric during failover
situations.
Restrictions
• Downgrading from Cisco MDS NX-OS Release 8.1(1) to an earlier release is not supported when FLOGI
Scale Optimization is enabled. This feature must be disabled before downgrading. For more information
on disabling this feature, see the Disabling FLOGI Scale Optimization and Quiesce Timeout section.
• In Cisco MDS NX-OS Releases 8.1 and Release 8.2, the default FLOGI quiesce timeout value is 2000
ms.
However, starting with Cisco MDS NX-OS Release 8.3(1), the default FLOGI quiesce timeout value
was changed from 2000 ms to 0 ms. Any configured FLOGI quiesce timeout value will be maintained
on upgrading. If the FLOGI quiesce timeout value is not configured when upgrading to Cisco MDS
NX-OS Releases 8.3(1) or later release, the new default value of 0 ms will be used.
• This feature is supported on all MDS switches, except Cisco MDS 9250i Multiservice Fabric Switch and
Cisco MDS 9148S 16G Multilayer Fabric Switch.
• Cisco DCNM and SNMP support is not available for this feature.
• This feature is supported only on the Fibre Channel ports on the Cisco MDS 24/10 port SAN Extension
Module.
Enabling FLOGI Scale Optimization and Quiesce Timeout
To enable FLOGI scale optimization and quiesce timeout, perform the following steps:
Step 1 Enter global configuration mode:
switch# configure terminal
Step 2 Enable FLOGI scale optimization:
switch(config)# flogi scale enable
Step 3 Set the FLOGI quiesce timeout value to retain device login information:
switch(config)# flogi quiesce timeout milliseconds
For information on the default FLOGI quiesce timeout value, see the Restrictions section.
Step 4 Exit global configuration mode:
switch(config)# exit
Cisco MDS 9000 Series Fabric Configuration Guide, Release 8.x
210
Managing FLOGI, Name Server, FDMI, and RSCN Databases
FLOGI Quiesce Timeout

Cisco MDS 9000 Series Specifications

General

Category	Switch
Operating System	Cisco NX-OS
Ports	Varies by model
Protocols	Fibre Channel (FC), Fibre Channel over IP (FCIP), iSCSI
Redundancy	Redundant supervisors, power supplies, and fans
Management	Cisco Data Center Network Manager (DCNM), CLI, SNMP
Virtualization Support	VSANs (Virtual SANs)
Security Features	Fibre Channel Security Protocol (FC-SP)
Hot Swappable Components	power supplies, fans
Power Supply Options	AC and DC options available