Reference Guide
Example
FTOS#sho is traffic
 IS-IS: Level-1 Hellos (sent/rcvd) : 0/721
 IS-IS: Level-2 Hellos (sent/rcvd) : 900/943
 IS-IS: PTP Hellos (sent/rcvd) : 0/0
 IS-IS: Level-1 LSPs sourced (new/refresh) : 0/0
 IS-IS: Level-2 LSPs sourced (new/refresh) : 1/3
 IS-IS: Level-1 LSPs flooded (sent/rcvd) : 0/0
 IS-IS: Level-2 LSPs flooded (sent/rcvd) : 5934/5217
 IS-IS: Level-1 LSPs CSNPs (sent/rcvd) : 0/0
 IS-IS: Level-2 LSPs CSNPs (sent/rcvd) : 472/238
 IS-IS: Level-1 LSPs PSNPs (sent/rcvd) : 0/0
 IS-IS: Level-2 LSPs PSNPs (sent/rcvd) : 10/337
 IS-IS: Level-1 DR Elections : 4
 IS-IS: Level-2 DR Elections : 4
 IS-IS: Level-1 SPF Calculations : 0
 IS-IS: Level-2 SPF Calculations : 389
 IS-IS: LSP checksum errors received : 0
 IS-IS: LSP authentication failures : 0
FTOS#
spf-interval
Specify the minimum interval between shortest path first (SPF) calculations.
S4820T
Syntax
spf-interval [level-l | level-2] interval seconds 
[initial_wait_interval seconds [second_wait_interval seconds]]
To restore default values, use the no spf-interval [level-l | level-2] 
interval seconds [initial_wait_interval seconds 
[second_wait_interval seconds]] command.
Parameters
level-l (OPTIONAL) Enter the keyword level-1 to apply the configuration 
to Level-1 SPF calculations.
level-2 (OPTIONAL) Enter the keyword level-2 to apply the configuration 
to Level-2 SPF calculations.
interval seconds
Enter the maximum number of seconds between SPF calculations. 
The range is from 0 to 120 seconds. The default is 10 seconds.
initial_wait_interv
al seconds
(OPTIONAL) Enter the initial wait time, in seconds, before running the 
first SPF calculations. The range is from 0 to 120 seconds. The default 
is 5 seconds.
second_wait_inte
rval seconds
(OPTIONAL) Enter the wait interval, in seconds, between the first and 
second SPF calculations. The range is from 0 to 120 seconds. The 
default is 5 seconds.
Defaults Refer to 
Parameters
.
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