On 8/21/07, ann kok <<a href="mailto:annkok2001@yahoo.com">annkok2001@yahoo.com</a>> wrote:<div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hi all I run a traceroute or traceroute -n and got some node " Icmp checksum is wrong" Do you know why? can it cause the packet loss? Thank you 12 <a href="http://64.230.23.1"> 64.230.23.1</a> 32.268 ms 35.877 ms 59.515 ms Icmp checksum is wrong 13 <a href="http://69.158.15.2">69.158.15.2</a> 34.706 msIcmp checksum is wrong 35.632 msIcmp checksum is wrong 36.856 ms Icmp checksum is wrong 14 <a href="http://69.158.15.2">69.158.15.2</a> 38.714 msIcmp checksum is wrong 65.466 msIcmp checksum is wrong 42.031 ms ____________________________________________________________</blockquote> <div> Is this traceroute to a DSL router by any chance? If so, try updating the firmware. ICMP messages are not required to report checksum errors, but some (older) implementations still do. </div> </div>