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STATUS_PROTOCOL_UNREACHABLE
The remote endpoint cannot be reached with that protocol
This status describes protocol reachability at the transport/network boundary. The local stack was able to express the request, but the remote side or path does not support the selected protocol.
Capture the destination, address family, and protocol number at the failed operation. Distinguish an unsupported or unreachable protocol path from a host or port reachability problem higher in the stack.
What to inspect
- Record the protocol, destination address, and port.
- Check whether an ICMP protocol-unreachable condition was returned.
- Compare this with STATUS_PORT_UNREACHABLE, which is about the destination port rather than protocol support.
References for STATUS_PROTOCOL_UNREACHABLE
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