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Subject: Re: Questions regarding CA protocol specification and phylosophy
From: Diego Sanz <dshernan80@gmail.com>
To: Dirk Zimoch <dirk.zimoch@psi.ch>
Cc: EPICS Tech Talk <tech-talk@aps.anl.gov>
Date: Wed, 13 Sep 2017 17:05:49 +0200
First of all, thanks a lot

Starting for the configuration: the 2 IOCs and the EPICS client is in the same Host, no firewall...
If I understood correctly, every IOC, shall be working in different IPs on different subnetworks? e.g., 

IOC1 on 192.168.0.2 

IOC2 on 192.168.1.3

and client shall have access to booth IPs....

So then, the configuration as follows is not correct:

all of them working on 127.0.0.1

Is well understood?

Thanks a lot 

Diego



2017-09-13 16:26 GMT+02:00 Dirk Zimoch <dirk.zimoch@psi.ch>:
On 13.09.2017 16:03, Kasemir, Kay wrote:
The main issue here is not TCP but UDP.

Just for completeness: TCP can be an issue as well if you have a firewall between client and IOC. Even if if you tell the firewall to allow the CA ports for UDP and TCP then the search broadcast may pass, maybe even the reply reaches the client, but you still may not be able to connect to the dynamically assigned TCP port of the second IOC.

Dirk


Replies:
Re: Questions regarding CA protocol specification and phylosophy Kasemir, Kay
Re: Questions regarding CA protocol specification and phylosophy Michael Davidsaver
References:
Questions regarding CA protocol specification and phylosophy Diego Sanz
Re: Questions regarding CA protocol specification and phylosophy Kasemir, Kay
Re: Questions regarding CA protocol specification and phylosophy Dirk Zimoch

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