What Do the Bad Protocol and No Route Items Denote in the Statistics on IP Traffic?

Created Apr 14, 2017 08:46:51Latest reply Apr 14, 2017 15:33:17 733 1 0 0
What Do the Bad Protocol and No Route Items Denote in the Statistics on IP Traffic?
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Adamcolob     Created Apr 14, 2017 15:33:17 Helpful(0) Helpful(0)

The bad protocol item records the number of IP packets of unknown protocols. The protocol type fields in the headers of these IP packets cannot be identified by the upper layer protocol.

After an IP packet reaches the device, the bad protocol item increases by 1 if no application module receives this IP packet. Generally, unorderly packets or malicious attack packets on the network are counted when failing the protocol number check. The correct protocol number for UDP is 17, for TCP is 6, for ICMP is 1, and for Telnet is 23.

The no route item records the number of the packets discarded when the correct routing information cannot be found. The packets include the packets forwarded and sent by the local device.
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