Re: Help in debugging ACF connection issue

[Michael Davidsaver via Tech-talk <tech-talk at aps.anl.gov>]

Hi Yong,

On 3/6/26 2:59 PM, Hu, Yong wrote:

...

3.  Manually start the first softIOC 'bpm-fron':  it has an ACF which reads a PV (myCommand:just4TestACF) that is provided by the second softIOC 'bpm-rear' .

Could you also add a record with a CA link to "myCommand:just4TestACF"?

I would be interested to know if you have a situation where dbCa can connect, but asCa can not.

also, with https ://github.com/mdavidsaver/cashark the "tshark" CLI can give more meaningful output than "tcpdump".

...

Conclusion: just as I mentioned below, most likely your IOCs start before your server's network is fully functional (valid IP address). 

To CA developers: Is this a feature or a bug in the Access security Channel Access (asCa)?

This may be related to the behavior of EPICS_CA_AUTO_ADDR_LIST=YES, which is evaluated once at startup using the list of interfaces configured at that time.