Users Guide

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 See 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, see
the relevant Dell Networking OS Command Line Reference Guide.
Version Description
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.8(1.0) Introduced on the Z9100–ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-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
Intermediate System to Intermediate System (IS-IS) 1178