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network performance

Linux: Configuring RX POLLING (NAPI)

My CentOS / RHEL based server is configured with Intel PRO/1000 network interface cards. NAPI (Rx polling mode) is supported in the e1000 driver. I've multiple CPUs. How do I configure NAPI, decreasing interrupts and improve overall server network performance?
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Linux MTU Change Size

We've gigabit networks, and large maximum transmission units (MTU) sizes (JumboFrames) can provide better network performance for our HPC environment. How do I change MTU size under Linux?
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What Would Cause a Lot of ARP Broadcasts From One System / Machine

Q. I'm experiencing decreased network performance due to ARP broadcasts coming from one system. What would cause a lot of ARP broadcasts from one server / computer?
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How does SNMP work?

Can you tell me how does SNMP (Simple Network Management Protocol) work?
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