• Ethernet segments should not feature a sustained utilization of 40% or higher
• All Ethernet segments should be switched – no shared segments (hub-based)
• No WAN links should feature a sustained utilization of 70% or higher
• Response times should be generally less than 100 ms
• LAN response times should generally be 2 ms
• No segments have more than one cyclic redundancy check (CRC) error per million bytes of data.
• No segments should have more than one CRC (cyclic redundancy check) error per million bytes of data
• No segments should have more than 20 percent multicast or broadcast traffic
• For Ethernet segments, there should be less than .1 percent collisions
• Over 5 minute intervals, CPU utilization should not exceed 75%
• The number of output queue drops should not exceed 100 in an hour
• The number of input queue drops should not exceed 50 in an hour
• The number of buffer misses should not exceed 25 in an hour
• The number of ignored packets should not exceed 10 in an hour

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