Dell S6000 Reference Manual page 855

Command line for the system

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Version 9.0.2.0

Version 8.3.11.1

Version 7.8.1.0

Version 7.5.1.0

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 time).

Intermediate System to Intermediate System (IS-IS)

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.