Brocade Communications Systems 12.4.00 manual Smoothing mechanism for RTT measurements

Smoothing mechanism for RTT measurements 1

RTT state before application of RTT smoothing mechanism:

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RTT val = 114, RTT decimal val = 0.0

Applied RTT smoothing algorithm for new RTT sample 30 RTT state after application of RTT smoothing mechanism:

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RTT value after smoothing = 105, RTT decimal val = 0.0 GSLB-ServerIronADX(config-gslb-rtt-sim-test)# rtt-val 30 SIMULATOR: Enhanced RTT smoothing is OFF

RTT state before application of RTT smoothing mechanism:

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RTT val = 105, RTT decimal val = 0.0

Applied RTT smoothing algorithm for new RTT sample 30 RTT state after application of RTT smoothing mechanism:

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RTT value after smoothing = 97, RTT decimal val = 0.0 GSLB-ServerIronADX(config-gslb-rtt-sim-test)# rtt-val 30 SIMULATOR: Enhanced RTT smoothing is OFF

RTT state before application of RTT smoothing mechanism:

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RTT val = 97, RTT decimal val = 0.0

Applied RTT smoothing algorithm for new RTT sample 30 RTT state after application of RTT smoothing mechanism:

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RTT value after smoothing = 90, RTT decimal val = 0.0 GSLB-ServerIronADX(config-gslb-rtt-sim-test)# exit

Example

The following example simulates the enhanced RTT smoothing mechanism for the same set of RTT samples used above; however, since parameters for the feature have not been configured for the Site "test", default values of the parameters are used.

GSLB-ServerIronADX# configure terminal GSLB-ServerIronADX(config)# gslb simulate-rtt-smoothing test 30

GSLB-ServerIronADX(config-gslb-rtt-sim-test)# enable-sim-new-rtt-smooth GSLB-ServerIronADX(config-gslb-rtt-sim-test)#rtt-val 1

SIMULATOR: Enhanced RTT smoothing is ON RTT sample value 1 is acceptable

RTT state before application of enhanced RTT smoothing mechanism:

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RTT val = 30, RTT decimal val = 0.0 ignore-larger-rtt-count = 0 ignore-smaller-rtt-count = 0, increment-rtt-factor = 1

Applied enhanced RTT smoothing algorithm for new RTT sample 1 RTT state after application of enhanced RTT smoothing mechanism:

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RTT value after smoothing = 27, RTT decimal val = 0.100 ignore-larger-rtt-count = 0 ignore-smaller-rtt-count = 0, increment-rtt-factor = 1

GSLB-ServerIronADX(config-gslb-rtt-sim-test)#rtt-val 1000 SIMULATOR: Enhanced RTT smoothing is ON

RTT sample value 1000 is not acceptable (higher)

RTT state before application of enhanced RTT smoothing mechanism:

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RTT val = 27, RTT decimal val = 0.100 ignore-larger-rtt-count = 0 ignore-smaller-rtt-count = 0, increment-rtt-factor = 1

Applied enhanced RTT smoothing algorithm for new RTT sample 1000 RTT state after application of enhanced RTT smoothing mechanism:

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