• An error is reported at the command prompt if the configured dead time interval is less than the hello
time interval
• During a software upgrade, ensure that the fspf dead-interval is greater than the ISSU downtime (80
seconds). If the fspf dead-interval is lesser than the ISSU downtime, the software upgrade fails and the
following error is displayed:
Service "fspf" returned error: Dead interval for interface is less than ISSU upgrade time.
Configuring Dead Time Intervals
To configure the FSPF dead time interval, follow these steps:
Step 1 switch# config terminal
switch(config)#
Enters configuration mode.
Step 2 switch(config)# interface fc1/4
switch(config-if)#
Configures the specified interface, or if already configured, enters configuration mode for the specified interface.
Step 3 switch(config-if)# fspf dead-interval 25 vsan 7
switch(config-if)#
Specifies the maximum interval for VSAN 7 before which a hello message must be received on the selected interface
before the neighbor is considered lost. The default is 80 seconds.
About Retransmitting Intervals
You can specify the time after which an unacknowledged link state update should be transmitted on the
interface. The integer value to specify retransmit intervals can range from 1 to 65,535 seconds.
This value must be the same on the switches on both ends of the interface.
Note
Configuring Retransmitting Intervals
To configure the FSPF retransmit time interval, follow these steps:
Step 1 switch# config terminal
switch(config)#
Enters configuration mode.
Cisco MDS 9000 Series Fabric Configuration Guide, Release 8.x
192
Configuring Fibre Channel Routing Services and Protocols
Configuring Dead Time Intervals
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