UDP Traffic Statistics

The UDP Traffic Statistics table provides statistics on the following:

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Connections Opened – Incremented when a UDP connection initiator sends a SYN, or a UDP connection responder receives a SYN.
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Connections Closed – Incremented when a UDP connection is closed when both the initiator and the responder have sent a FIN and received an ACK.
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Total UDP Packets – Incremented with every processed UDP packet.
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Validated Packets Passed – Incremented under the following conditions:
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When a UDP packet passes checksum validation (while UDP checksum validation is enabled).
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When a valid SYN packet is encountered (while SYN Flood protection is enabled).
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When a SYN Cookie is successfully validated on a packet with the ACK flag set (while SYN Flood protection is enabled).
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Malformed Packets Dropped - Incremented under the following conditions:
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When UDP checksum fails validation (while UDP checksum validation is enabled).
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When the UDP SACK Permitted (Selective Acknowledgement, see RFC1072) option is encountered, but the calculated option length is incorrect.
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When the UDP MSS (Maximum Segment Size) option is encountered, but the calculated option length is incorrect.
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When the UDP SACK option data is calculated to be either less than the minimum of 6 bytes, or modulo incongruent to the block size of 4 bytes.
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When the UDP option length is determined to be invalid.
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When the UDP header length is calculated to be less than the minimum of 20 bytes.
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When the UDP header length is calculated to be greater than the packet’s data length.
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UDP Floods In Progress – The number of individual forwarding devices that are currently exceeding the UDP Flood Attack Threshold.
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Total UDP Floods Detected – The total number of events in which a forwarding device has exceeded the UDP Flood Attack Threshold.
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Total UDP Flood Packets Rejected – The total number of packets dropped because of UDP Flood Attack detection.