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According to RFC specifications ``` RFC 1542 section 4.1.1 states: The relay agent MUST silently discard BOOTREQUEST messages whose 'hops' field exceeds the value 16." ``` "Exceeds the value 16" means hops > 16, i.e. a message that arrives with hops == 16 is still valid and must be relayed (after which its hops field becomes 17). The code used ">= 16", which silently dropped a valid message that had legitimately traversed exactly 16 relay agents, one hop too early. This matches the wording of the adjacent comment, which already says "exceeds the value 16".
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