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<div class="">So I’ve followed the 10G tuning guide, to what looks like great success. This is on a Intel X520 card with AF_PACKET and 1 RSS queue. The traffic load fluctuates between 4 and a peak of about 8 Gbps.</div>
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<span class="">capture.kernel_packets | Total | 22028847471<br class="">
capture.kernel_drops | Total | 40166<br class="">
decoder.pkts | Total | 22028920807</span>
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<div class=""><span class="">In digging around further, netstat -s show about 3% of packet reassemblies failing. Is this normal? This is my first foray into 10G capture and I don’t know what is normal at what level of diagnostic yet, and was hoping someone with
more experience could tell me if this was a problem or not.</span></div>
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<div class=""><span class="">I expanded the ipfrag_high_thresh kernel memory to try to allow more memory for packet reassmembly in case that was a factor.</span></div>
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<div class=""># expand ip_frag threshod to help packet reassembly</div>
<div class="">net.ipv4.ipfrag_high_thresh = 8388608</div>
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Ip:<br class="">
4509211 total packets received<br class="">
0 forwarded<br class="">
0 incoming packets discarded<br class="">
3351761 incoming packets delivered<br class="">
2369930 requests sent out<br class="">
121777 fragments dropped after timeout<br class="">
258550565 reassemblies required<br class="">
72996695 packets reassembled ok<br class="">
7823209 packet reassembles failed<br class="">
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</span><span class="">Thanks for any advice.</span></div>
<div class=""><span class="">Jeff</span></div>
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Jeffrey Collyer<br class="">
Information Security Engineer<br class="">
University of Virginia<br class="">
434-297-6317</div>
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