Hi Brian, Start with the way the URL is specified. Hostname? IP address? There is obviously a difference. I don't see anything in the client that ostensibly pushes it to use one or the other (though there really should be). Andy On Sun, 27 Apr 2014, Brian Bockelman wrote: > Hi all, > > I have a bit of a mystery to solve (this all running 4.0.0-rc1). > > When I run "xrdcp" from my worker nodes to my local Xrootd server, I see the transfers occur over IPv6. > > However, when I access files via a version of CMSSW from the same node to the same server, I see the transfers go over IPv4. > > Does anyone have any hints on how to determine why this difference occurs? Maybe just because it's Sunday, but I'm stumped on where to start. > > Thanks, > > Brian > ######################################################################## > Use REPLY-ALL to reply to list > > To unsubscribe from the XROOTD-DEV list, click the following link: > https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1 > ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-DEV list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1