000035361 - Additional configuration with 10G and 1 ultra DAC configuration in RSA Security Analytics 10.6

Document created by RSA Customer Support Employee on Jul 13, 2017Last modified by RSA Customer Support on Apr 7, 2018
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Article Number000035361
Applies ToRSA Product Set: Security Analytics
RSA Product/Service Type: Security Analytics Server, Ultra DAC
RSA Version/Condition: 10.6
IssueIn an environment with a Series 5 10G Ddecoder and 1 ultra DAC, consistent packet drops may occur at high bursts of 7-10g capture.
CauseWhen DACs do not have enough throughput to sustain the capture speed, this log message can be seen on the 10G Decoder in the /var/log/messages file as shown below.

[Warning] Write thread blocked waiting for previous file flush to finish
ResolutionWith 10G capture it is recommended to invest in 2 DACs.

With one Ultra DAC and 2 SAS connections, adjust the following configuration for 10G capture to hold more packets in memory during the time of high capture bursts: