Where to find SNMP Counters

• MIB-2 (RFC 1213) March 1991

  • RFC 1573 updates Jan 1994
    • Deprecated some counters
    • ifInNUCast deprecated and replaced by two counters: ifInMCast, ifInBCast…
    • Modified how ifIndex is used
    • Allowed sparse tables—i.e. data that doesn’t make sense shouldn’t exist (if[In|Out]Errors for subinterfaces, for example)
  • new device management and applications SHOULD use new MIB modules/counters and fall back to older or deprecated counters only as necessary. Now 10 years of compatibility !

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