On Tue, May 21, 2013 at 1:36 PM, Haoxuan Zheng <[email protected]> wrote: > Hi David, > I tried everything you suggested, and here's what I got: > 1) I don't see any new messages with dmesg on ROACH2 after the attempted > connection; maybe I did something wrong? I have never used dmesg before. > 2) I attached the wireshark screen shot comparing the working computer and > the non-working on. Basically the non-working computer goes through all the > processes that the working computer does, and then actively closes the > connection with [FIN, ACK]. Does this give any clues? > 3) The non-working computer had 0.7.3 which was newer than the working 0.7.1, > but uninstalling and installing 0.7.1 did not solve the problem. >
It might be worth doing a "Follow TCP conversation" or sending a .pcap file from Wireshark. --Andy > > Thanks a lot! > Jeff > > ________________________________________ > From: David MacMahon [[email protected]] on behalf of David MacMahon > [[email protected]] > Sent: Monday, May 20, 2013 12:58 PM > To: Haoxuan Zheng > Cc: [email protected] > Subject: Re: [casper] Python katcp cannot connect FPGA > > Hi, Jeff, > > That sounds like a weird one! Here are some ideas to try: > > 1) Check the output of "dmesg" on the roach2 after the problem occurs. > > 2) Watch the network traffic between the problematic machine and the roach2 > using tcpdump or wireshark. > > 3) Verify that the problematic computer is using the same python katcp > version as the working computers. > > Please send a message to the list once you figure it out. You'll likely make > some CASPER mailing list archive reader very happy in the future! :-) > > Hope this helps, > Dave > > On May 20, 2013, at 9:01 AM, Haoxuan Zheng wrote: > >> Hi CASPER, >> Sorry for the spam, but since my original message was sent at the worst hour >> of the week (Friday evening), I would like to give it another try: >> >> Our lab just got a new server which will be our data taking computer, and it >> has trouble connecting to our ROACH 2 through python katcp. Whenever I do >> fpga = corr.katcp_wrapper.FpgaClient('10.0.0.200', 7147, timeout = 60), >> fpga.is_connected() always say False. Here are some clues: >> >> 1) When I run the above command, I see the following on a separate telnet >> 7147 connection on the ROACH2 (which runs fine), and the client-disconnected >> message comes right after the client-connected message: >> >> #log info 946685931331 raw new\_client\_connection\_10.0.0.11:44001 >> #client-connected 10.0.0.11:44001 >> #client-disconnected 10.0.0.11:44001 >> >> 2) The new computer connects to the ROACH1s fine with python katcp. >> >> 3) All other computers connect to the ROACH2s fine with python katcp. >> >> I'm not sure if anyone else has experienced similar issues? Any help would >> be greatly appreciated! >> >> Thanks a lot! >> Jeff >
