ifInUnknownProtos - if In Unknown Protocols - rfc1573

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ifInUnknownProtos

if In Unknown Protocols
1.3.6.1.2.1.2.2.1.15

For packet-oriented interfaces, the number of packets received via the interface which were discarded because of an unknown or unsupported protocol. For character-oriented or fixed-length interfaces which support protocol multiplexing the number of transmission units received via the interface which were discarded because of an unknown or unsupported protocol. For any interface which does not support protocol multiplexing, this counter will always be 0.

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