Kennedy Clark wrote: >On 1/26/06, Dez Cadena <[EMAIL PROTECTED]> wrote: > > >>Updating myself here... >> >>I've realised that fping only succeeds if I set the packet size to >>something really small (e.g. 20bytes) >>whereas ping has no problem with the default packet size (56). The >>mystery remains. >> >> > >Two things to try: > >1) If you have access to the 2600 router, telnet/SSH to it and do a "term >mon" and a "debug ip icmp". Might give some clues. Could also do a "debug >ip packet detail <acl_#>" for a slightly different view. Should help >indicate if: a) echo requests are reaching the router, and b) if it is >responding. >2) Capture a few sample packets with both ping and fping using tcpdump. >Assuming you are SSH'ed to to a UNIX box, you might try something like: > tcpdump -p -w <filename_here> not port 22 >Then do a ping each way and Ctrl+C to kill the capture. You can then view >the file with something like Ethereal. > > > Unfortunately, I had already tried both 1 and 2 already. From (1) I gathered that fping echo requests are NOT reaching the router. (2) was inconclusive because I could not spot any significant differences between fping and ping echo requests.
I've also found out that there's a few more devices that behave similarly. They all are cisco 26xx with the same IOS release but so are many many other *responsive* targets. thanks for the input -- Unsubscribe mailto:[EMAIL PROTECTED] Help mailto:[EMAIL PROTECTED] Archive http://lists.ee.ethz.ch/smokeping-users WebAdmin http://lists.ee.ethz.ch/lsg2.cgi
