Zhao, Forrest wrote: > 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. However, if PMTU discovery is disabled, the kernel won't normally being sending packets with the DF flag set, so you are unlikely to receive this message (so the outbound packets will just get fragmented instead). -- Glynn Clements <glynn.clements@virgin.net> - : 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
