Dell C9000 Series Reference Manual page 1123

Networking command-line reference guide

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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.

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.

The first route calculation is controlled by the initial wait interval and the second

calculation is controlled by the second wait interval. Each subsequent wait interval is

twice as long as the previous one until the wait interval reaches the maximum wait time

specified (interval seconds). After the network calms down and there are no

triggers for two times the maximum interval, fast behavior is restored (the initial wait

Introduced on the C9010.

Introduced on the Z9500.

Introduced on the S6000.

Introduced on the S4820T.

Introduced on the Z9000.

Introduced on the S4810.

Added support for multi-topology ISIS.

Added support for SPF Throttling Enhancement.

Intermediate System to Intermediate System (IS-IS)

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