Cisco MDS 9000 Series Configuration Guide

FSPF Global Configuration
By default, FSPF is enabled on switches in the Cisco MDS 9000 Family.
Some FSPF features can be globally configured in each VSAN. By configuring a feature for the entire VSAN,
you do not have to specify the VSAN number for every command. This global configuration feature also
reduces the chance of typing errors or other minor configuration errors.
FSPF is enabled by default. Generally, you do not need to configure these advanced features.
Note
The default for the backbone region is 0 (zero). You do not need to change this setting unless your region is
different from the default. If you are operating with other vendors using the backbone region, you can change
this default to be compatible with those settings.
Caution
This section includes the following topics:
About SPF Computational Hold Times
The SPF computational hold time sets the minimum time between two consecutive SPF computations on the
VSAN. Setting this to a small value means that FSPF reacts faster to any fabric changes by recomputing paths
on the VSAN. A small SPF computational hold time uses more switch CPU time.
About Link State Record Defaults
Each time a new switch enters the fabric, a link state record (LSR) is sent to the neighboring switches, and
then flooded throughout the fabric. Table 19: LSR Default Settings , on page 188 displays the default settings
for switch responses.
Table 19: LSR Default Settings
DescriptionDefaultLSR Option
The time a switch waits for an acknowledgment from
the LSR before retransmission.
5 secondsAcknowledgment interval
(RxmtInterval)
The time a switch waits before sending an LSR refresh
transmission.
30 minutesRefresh time (LSRefreshTime)
The time a switch waits before dropping the LSR from
the database.
60 minutesMaximum age (MaxAge)
The LSR minimum arrival time is the period between receiving LSR updates on this VSAN. Any LSR updates
that arrive before the LSR minimum arrival time are discarded.
The LSR minimum interval time is the frequency at which this switch sends LSR updates on a VSAN.
Cisco MDS 9000 Series Fabric Configuration Guide, Release 8.x
188
Configuring Fibre Channel Routing Services and Protocols
FSPF Global Configuration

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