igb: Add anti-spoofing feature documentation
Add the documentation for the anti-spoofing feature in the HW. Signed-off-by: Greg Rose <gregory.v.rose@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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@ -93,6 +93,19 @@ Additional Configurations
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REQUIREMENTS: MSI-X support is required for Multiqueue. If MSI-X is not
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found, the system will fallback to MSI or to Legacy interrupts.
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MAC and VLAN anti-spoofing feature
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----------------------------------
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When a malicious driver attempts to send a spoofed packet, it is dropped by
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the hardware and not transmitted. An interrupt is sent to the PF driver
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notifying it of the spoof attempt.
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When a spoofed packet is detected the PF driver will send the following
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message to the system log (displayed by the "dmesg" command):
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Spoof event(s) detected on VF(n)
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Where n=the VF that attempted to do the spoofing.
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Support
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=======
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