When I read the code about the ICMP message handling, I found a question: When the host receive the ICMP message : Type = 3 (Destination Unreachable) Code = 4 (Fragmentation needed and DF set) If (ipv4_config.no_pmtu_disc) is set(to 1), then kernel will do nothing. I'd like to know what will happen if the kernel do nothing after receiving this ICMP message? The connection between source and destination will not be setup forever?? Thanks in advance Forrest - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html