Re: Problems with CA

[Florian Feldbauer <florian@ep1.ruhr-uni-bochum.de>]

Hey,

@Ernest
I did not set ENV vars for the ports, so they should be the default ones 
on both systems (5064 & 5065)
The only EPICS relevant ENV vars which are set are
EPICS_HOST_ARCH, EPICS_CA_AUTO_ADDR_LIST and EPICS_CA_ADDR_LIST.

On 01/29/2015 02:13 PM, Mark Rivers wrote:
> If the subnet mask and CA environment variables are OK then:
>
> - What is the network topology between 192.168.1.1 and 192.168.1.6.  Only switches between them?
Yes. There is only a switch between both PCs.
> - Is there a firewall (e.g. iptables, etc.) running on either machine?
Yes...there WAS a firewall (firewalld) running....and the ports 5064 and 
5065 were opened for TCP and UDP.
But after stopping the firewall it worked...so obviously I did something 
wrong with its configuration...

Thanks for your help!

Florian
> Mark
>
>
>
> ________________________________________
> From: tech-talk-bounces@aps.anl.gov [tech-talk-bounces@aps.anl.gov] on behalf of Mark Rivers [rivers@cars.uchicago.edu]
> Sent: Thursday, January 29, 2015 6:50 AM
> To: Florian Feldbauer; EPICS Tech Talk
> Subject: RE: Problems with CA
>
> That should have worked.
>
> Are you sure that you have set the subnet mask on your IOC machine correctly?
>
> Mark
>
> ________________________________________
> From: Florian Feldbauer [florian@ep1.ruhr-uni-bochum.de]
> Sent: Thursday, January 29, 2015 6:44 AM
> To: Mark Rivers; EPICS Tech Talk
> Subject: Re: Problems with CA
>
> Hey,
>
> thanks for the answers.
> Unfortunately I did not work:
>
> Here is what I tried:
>
>    ~ > ifconfig p3p1
> p3p1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>           inet 192.168.1.1  netmask 255.255.255.0  broadcast 192.168.1.255
>           inet6 fe80::213:3bff:fe0f:e7bf  prefixlen 64  scopeid 0x20<link>
>           ether 00:13:3b:0f:e7:bf  txqueuelen 1000  (Ethernet)
>           RX packets 39249  bytes 5375914 (5.1 MiB)
>           RX errors 0  dropped 0  overruns 0  frame 0
>           TX packets 192403  bytes 81244106 (77.4 MiB)
>           TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
>
>    ~ > setenv EPICS_CA_AUTO_ADDR_LIST NO
>    ~ > setenv EPICS_CA_ADDR_LIST 192.168.1.255
>    ~ > caget -w 20 PANDA:LMD:MUPIX:HV:TLSCP:0:Vmom
> Channel connect timed out: 'PANDA:LMD:MUPIX:HV:TLSCP:0:Vmom' not found.
>    ~ > setenv EPICS_CA_ADDR_LIST 192.168.1.6
>    ~ > caget PANDA:LMD:MUPIX:HV:TLSCP:0:Vmom
> PANDA:LMD:MUPIX:HV:TLSCP:0:Vmom 0.0489747
>
>
> p3p1 is the name of the network interface to which all our EPICS IOCs
> are connected...
>
>     Florian
>
> On 01/29/2015 12:58 PM, Mark Rivers wrote:
> > > Is there a way to specify a subnet as address lsit for CA?
> > Yes.
> >
> > setenv EPICS_CA_AUTO_ADDR_LIST NO
> > setenv EPICS_CA_ADDR_LIST 192.168.1.255
> >
> > where 192.168.1.255 is the broadcast address of that subnet.  That syntax would be correct if the subnet mask is 255.255.255.0.
> >
> > Mark
> >
> >
> > ________________________________________
> > From: tech-talk-bounces@aps.anl.gov [tech-talk-bounces@aps.anl.gov] on behalf of Florian Feldbauer [florian@ep1.ruhr-uni-bochum.de]
> > Sent: Thursday, January 29, 2015 3:35 AM
> > To: EPICS Tech Talk
> > Subject: Problems with CA
> >
> > Hey all,
> >
> > I have observed some problems with channel access in our lab.
> > We have a PC with three network interfaces.
> > On is connected to the network of our institute (->WAN)
> > the other two are used for local sub nets with its own DNS/DHCP...
> > The used OS on this PC is Fedora 20.
> >
> > On one of these local sub nets I have a running EPICS IOC.
> > When using caget on the PC I always get a timeout error.
> > Only when I specify the environment variables:
> >        setenv EPICS_CA_AUTO_ADDR_LIST no
> >        setenv EPICS_CA_ADDR_LIST 192.168.1.6
> > caget works.
> >
> > The IP addresses for the local subnet are dynamically assigned,
> > and I don't want to look up each time, which addresses are used....
> > Also I don't want to put all 256 possible addresses in the
> > EPICS_CA_ADDR_LIST.
> >
> > Is there a way to specify a subnet as address lsit for CA?
> > Or is it possible to bind all request (from Clients as well as from
> > Servers) on the machine
> > to one specific interface?
> >
> > Best regards,
> > Florian
> >
> >
> > --
> > ----------------------------------------
> > | Dr. Florian Feldbauer                |
> > |                                      |
> > | Helmholtz-Institut Mainz /           |
> > | Johannes Gutenberg-Universität Mainz |
> > | Johann-Joachim-Becher-Weg 36         |
> > | D-55128 Mainz                        |
> > |                                      |
> > | Office: SB1 / 00-213                 |
> > | Phone:  (+49)6131 / 39-29605         |
> > ----------------------------------------
>
> --
> ----------------------------------------
> | Dr. Florian Feldbauer                |
> |                                      |
> | Helmholtz-Institut Mainz /           |
> | Johannes Gutenberg-Universität Mainz |
> | Johann-Joachim-Becher-Weg 36         |
> | D-55128 Mainz                        |
> |                                      |
> | Office: SB1 / 00-213                 |
> | Phone:  (+49)6131 / 39-29605         |
> ----------------------------------------


--
----------------------------------------
| Dr. Florian Feldbauer                |
|                                      |
| Helmholtz-Institut Mainz /           |
| Johannes Gutenberg-Universität Mainz |
| Johann-Joachim-Becher-Weg 36         |
| D-55128 Mainz                        |
|                                      |
| Office: SB1 / 00-213                 |
| Phone:  (+49)6131 / 39-29605         |
----------------------------------------