Re: cross subnet CA communication

[Geoff Savage <savage@fnal.gov>]

Can you run tcpdump on a linux box in the 236 subnet to look for the  
broadcast from iocfb1?
Does a ping from each IOC see the other IOC?
What do you do to switch between the different kernels and EPICS  
versions when you boot?  Are you missing a non-EPICS configuration in  
this process?

Geoff

On Apr 2, 2008, at 12:33 PM, Sue Witherspoon wrote:
> Greetings,
>  I have a curious problem concerning multi-subnet connectivity when  
> converting from Epics 3.13.2 to Epics 3.14.8.2.  Using the same  
> network setup and database the 3.13 db can communicate across  
> subnets while the 3.14 db gets a link error.
> Again, if iocfb1 is running Epics 3.13.2 and Tornado 1.0.1 then  
> there is no link error and there's communication between the two  
> subnets, but if iocfb1 is running Epics 3.14.8.2 and Tornado 2.2.1  
> then I get a link error.  Any suggestions?
>
> Here is my setup:
>  iocmc1 129.57.236.20         iocfb1 129.57.230.101
>  Epics 3.13.2                         Epics 3.14.8.2
>  mvme-2700                          mvme-2700
>  Tornado 1.0.1                      Tornado 2.2.1
>
>   database record  on iocfb1 129.57.230.101
>       record(ai,"iocfb1:mc1com1") {
>         field(DESC,"analog input record")
>         field(SCAN,"Passive")
>         field(INP,"iocmc1:heartbeat.VAL")
>        }
>
>  database record on iocmc1  129.57.236.20
>      record(calc,"iocmc1:heartbeat") {
>         field(DESC,"calculation record")
>         field(SCAN,"1 second")
>        }
>
>   resource.def file  for iocfb1
>       putenv ("EPICS_CA_AUTO_ADDR_LIST = YES")
>       putenv ("EPICS_CA_ADDR_LIST = 129.57.239.255")
>
>   bootParams:
> boot device          : dc0
> processor number     : 0
> host name            : devfs
> file name            : /devsite/op/iocs/iocfb1/vx/vxWorks.st
> inet on ethernet (e) : 129.57.230.101:fffffc00
> inet on backplane (b):
> host inet (h)        : 129.57.228.40
> gateway inet (g)     : 129.57.228.1
> user (u)             : vxwrks
> ftp password (pw) (blank = use rsh):
> flags (f)            : 0x80
> target name (tn)     : iocfb1
> startup script (s)   : /devsite/op/iocs/iocfb1/startup
>
>   resource.def file  for iocmc1       EPICS_CA_ADDR_LIST DBF_STRING  
> "129.57.211.255 129.57.243.255 129.57.255.10"
>
>  bootParams:
> boot device          : dc
> processor number     : 0
> host name            : opsfs
> file name            : /opssite/op/iocs/iocmc1/vx/vxWorks.st
> inet on ethernet (e) : 129.57.236.20:fffffc00
> host inet (h)        : 129.57.236.40
> user (u)             : vxwrks
> flags (f)            : 0x80
> target name (tn)     : iocmc1
> startup script (s)   : /opssite/op/iocs/iocmc1/startup