Re: CA connection problems between VxWorks and Windows

["Hartman, Steven M." <hartmansm@ornl.gov>]

> On Aug 8, 2016, at 7:44 AM, Benjamin Franksen <benjamin.franksen@helmholtz-berlin.de> wrote:
> 
> The strange thing is that it works if we use EPICS_CA_ADDR_LIST to ask a
> CA gateway in /another/ network, but not if we connect to the VxWorks
> IOC (in the same network) directly. We can also conect to channels from
> soft IOCs runing on a linux host in the same network. Finally, replacing
> the Windows machine with a linux host with the same IP and connected to
> the same port of the same switch works flawless. I may be wrong but I
> think this rules out interference from any of the network components.


Hi Ben—

Perhaps the arp table is getting corrupted by some mis-behaving device on the network. That could explain the 15 minute recovery time. Try running ‘arpShow’ and ‘inetstatShow’ on the VxWorks box, and ‘arp -a’ and ‘netstat -a -n’ on the Windows box, both when it is working and when it is not. 

Even more useful would be to run something like wireshark on the Windows box to see what is happening on the network. 

-- 
Steven Hartman
hartmansm@ornl.gov