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Congestion Avoidance

Congestion Avoidance. Configuring Class-Based Weighted RED. WRED Building Blocks. DSCP-Based WRED (Assured Forwarding). Changing WRED Sensitivity to Bursts. router(config-pmap-c)#. random-detect exponential-weighting-constant n.

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Congestion Avoidance

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  1. Congestion Avoidance Configuring Class-Based Weighted RED

  2. WRED Building Blocks

  3. DSCP-Based WRED(Assured Forwarding)

  4. Changing WRED Sensitivity to Bursts router(config-pmap-c)# random-detect exponential-weighting-constant n • WRED takes the average queue size to determine the current WRED mode (no drop, random drop, full drop). • High values of N allow short bursts. • Low values of N make WRED more burst-sensitive. • Default value (9) should be used in most scenarios. • Average output queue size with N=9 is • Qave(t+1) = Qave(t) * 0.998 + Qt * 0.002

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