Service Manual

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.
Command Modes
• ROUTER ISIS (for IPv4)
• CONFIGURATION-ROUTER-ISIS-ADDRESS-FAMILY-IPV6 (for IPv6)
Command History
This guide is platform-specific. For command information about other platforms,
refer to the relevant Dell Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.8(0.0) Introduced on the S3048-ON and S4048-ON.
9.7(0.0) Introduced on the S6000-ON.
9.5(0.1) Introduced on the Z9500.
9.0.2.0 Introduced on the S6000.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.12.0 Introduced on the S4810.
7.8.1.0 Added support for multi-topology ISIS.
7.5.1.0 Added support for SPF Throttling Enhancement.
Usage Information
This command spf-interval in CONFIG-ROUTER-ISIS-AF-IPV6 mode is used
for IPv6 Multi-Topology route computation only. If using Single Topology mode,
use the spf-interval command in CONFIG-ROUTER-ISIS mode for both IPv4
and IPv6 route computations.
SPF throttling slows down the frequency at which route calculations are performed
during network instability. Even though throttling route calculations slows down
network convergence, not throttling can result in a network not functioning as
expected. If network topology is unstable, throttling slows down the scheduling of
route calculations until the topology regains its stability.
1074
Intermediate System to Intermediate System (IS-IS)