Alcatel-Lucent 7705 - Figure 18 Damping Example

Route Policy Configuration Overview
432 7705 SAR OS Router Configuration Guide
Damping is optional. If damping is configured, the following parameter values must be
explicitly specified because there are no default values:
• suppress
• half-life
• reuse
• max-suppress
When a route’s FoM value exceeds the suppress value, the route is removed from the routing
table. The route is considered to be stable when the FoM drops below the reuse value by
means of the specified half-life parameter. The route is then returned to the routing tables.
When routes have higher FoM and half-life values, they are suppressed for longer periods of
time. Figure 18 depicts an example of a flapping route, the suppress threshold, the half-life
decay (time), and reuse threshold. The peaks represent route flaps, and the slopes represent
half-life decay.
Figure 18: Damping Example
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SUPPRESS THRESHOLD
REUSE THRESHOLD
Time
FoM