On Tue, Jun 19, 2007 at 08:41:51PM +0200, someone somewhere wrote: > > Today, my ISP was having some problems. Before I knew that it was the ISP's > fault, I ran wireshark but got some strange results. I only got ARP and DHCP > traffic when I was pinging a host with no success (by ip address, not dns > name). Why didn't at least the outgoing ping request show up ? According to > windows, I did have a valid ip address.
Did you ping something on your local network or something behind the default gateway? If the first, were the arp's that you see for the ip-address that you pinged? And did you get an arp reply on them? If the pinged address was not on your local network, were the arp-packets arp-request for the default gateway? Did you get a response? In order for your system to ping a host, ie send an icmp-echo packet to it, it needs to know what system to send it to. It can only send packets to directly connected systems. In order to find out which system to send it too, it needs to have the mac-address of that system. Arp is used to find the matching mac-address to an ip-address or the next hop towards the ip-address. I hope this helps, Cheers, Sake _______________________________________________ Wireshark-users mailing list Wireshark-users@wireshark.org http://www.wireshark.org/mailman/listinfo/wireshark-users
