<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">If the rPi is only doing caput’s to signals on adaqsc, then it should be sufficient to set EPICS_CA_ADDR_LIST to adaqsc’s ip address. (And set EPICS_CA_AUTO_ADDR_LIST=NO). <div class=""><br class=""></div><div class="">I wouldn’t think having ethernet and wifi both active would be a problem as linux should choose just one route.</div><div class=""><br class=""></div><div class="">Ole does have a private network backchannel connecting his machines. Because of that the “NO” setting is particularly important.</div><div class=""><br class=""></div><div class="">Steve</div><div class=""><br class=""><div class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Jun 28, 2022, at 6:32 AM, Marc Mcmullen <<a href="mailto:mcmullen@jlab.org" class="">mcmullen@jlab.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class="">
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<div class=""><span style="-webkit-tap-highlight-color: transparent; -webkit-text-size-adjust: 100%;" class="">Hi Brad,</span><br class="">
</div>
<div class=""><span style="-webkit-tap-highlight-color: transparent; -webkit-text-size-adjust: 100%;" class=""><br class="">
</span></div>
<div class=""><span style="-webkit-tap-highlight-color: transparent; -webkit-text-size-adjust: 100%;" class="">A week or so, I had them moved from the hall A eel s/n (192) to the hall A s/n (188) where the BB Rpi has been. </span></div>
<div class=""><span style="-webkit-tap-highlight-color: transparent; -webkit-text-size-adjust: 100%;" class=""><br class="">
</span></div>
<div class=""><span style="-webkit-tap-highlight-color: transparent; -webkit-text-size-adjust: 100%;" class="">I’ll get with Brian to make sure the shell environment settings are correct. </span><br class="">
</div>
<div class=""><span style="-webkit-tap-highlight-color: transparent; -webkit-text-size-adjust: 100%;" class=""><br class="">
</span></div>
<div class=""><span style="-webkit-tap-highlight-color: transparent; -webkit-text-size-adjust: 100%;" class="">Tomorrow, I’ll disable the wifi on that Rpi and see if that will fix the issue. </span></div>
<div class=""><span style="-webkit-tap-highlight-color: transparent; -webkit-text-size-adjust: 100%;" class=""><br class="">
</span></div>
<div class=""><span style="-webkit-text-size-adjust: 100%;" class="">Regards,</span></div>
<div class=""><span style="-webkit-text-size-adjust: 100%;" class="">Marc</span></div>
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<br class="">
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<div id="divRplyFwdMsg" dir="ltr" class=""><font face="Calibri, sans-serif" style="font-size:11pt" class=""><b class="">From:</b> Brad Sawatzky <<a href="mailto:brads@jlab.org" class="">brads@jlab.org</a>><br class="">
<b class="">Sent:</b> Monday, June 27, 2022 9:03 PM<br class="">
<b class="">To:</b> Marc Mcmullen <<a href="mailto:mcmullen@jlab.org" class="">mcmullen@jlab.org</a>><br class="">
<b class="">Cc:</b> <a href="mailto:dsg-halla_gem@jlab.org" class="">dsg-halla_gem@jlab.org</a> <<a href="mailto:dsg-halla_gem@jlab.org" class="">dsg-halla_gem@jlab.org</a>><br class="">
<b class="">Subject:</b> [EXTERNAL] Re: SBS GEM process variables</font>
<div class=""> </div>
</div>
<div class="BodyFragment"><font size="2" class=""><span style="font-size:11pt;" class="">
<div class="PlainText">Hi Marc,<br class="">
<br class="">
That warning is due to the PV been mirrored on the channel access<br class="">
gateway. It is usually something of an inefficiency, but not fatal.<br class="">
However, failure to pay attention to this kind of thing can cause PV<br class="">
mirroring loops as a corner case.<br class="">
<br class="">
In general you want something like the following in your shell environ:<br class="">
export EPICS_CA_ADDR_LIST="129.57.191.255 129.57.164.255 129.57.192.255 129.57.255.11"<br class="">
The first three are gateway/broadcast addresses for Hall A networks.<br class="">
The last is the "Hall A" channel access gateway that provides a bridge<br class="">
to PVs outside the Hall A networks.<br class="">
I believe it is considered best practice to also set:<br class="">
export EPICS_CA_AUTO_ADDR_LIST=NO<br class="">
<br class="">
<br class="">
I did a 'caget' myself from within the Hall A network and got a bit of<br class="">
an odd response:<br class="">
adaq@adaq2 2038% caget HAGEM:SBS:gas:ch41<br class="">
CA.Client.Diagnostic..............................................<br class="">
Message: "Ambiguous channel host (multiple IOC's have a channel by that name)"<br class="">
Severity: "Warning" Context: "Channel: HAGEM:SBS:gas:ch41 Accepted: <a href="http://adaqsc-xb.cha.jlab.org:5064" class="">adaqsc-xb.cha.jlab.org:5064</a> Rejected: <a href="http://adaqsc.jlab.org:5064" class="">adaqsc.jlab.org:5064</a> "<br class="">
Source File: ../service.c Line Number: 910<br class="">
..................................................................<br class="">
HAGEM:SBS:gas:ch41 0.793<br class="">
<br class="">
The response is from <a href="http://adaqsc-xb.cha.jlab.org" class="">adaqsc-xb.cha.jlab.org</a>. That hostname resolves to<br class="">
10.58.164.210, which is some internal subnet. That seems a little odd<br class="">
to me. I'm not sure what is going on there, but Ole Hansen would be<br class="">
able to tell you. (I would have expected an RPi address on the 192 or<br class="">
164.)<br class="">
<br class="">
Have you updated the IP address for anything moved into the Hall (RPis,<br class="">
etc) to get them off the 'dev' subnet and on to an appropriate Hall<br class="">
network?<br class="">
<br class="">
Note that you may also see weird results if you have both the wired and<br class="">
wifi interfaces active. The wifi interface on the RPi should be<br class="">
permanently disabled.<br class="">
<br class="">
-- Brad<br class="">
<br class="">
<br class="">
On Mon, 27 Jun 2022, Marc Mcmullen wrote:<br class="">
<br class="">
> Hi Brad,<br class="">
> <br class="">
> Since the SBS Rpi was moved to the hall I have noticed a warning about the<br class="">
> pressure PVs during testing. Are there multiple servers running the HAGEM<br class="">
> PVs?<br class="">
> <br class="">
> CA.Client.Exception...............................................<br class="">
> <br class="">
> Warning: "Identical process variable names on multiple servers"<br class="">
> <br class="">
> Context: "Channel: "HAGEM:SBS:gas:ch41", Connecting to:<br class="">
> <a href="http://adaqsc.jlab.org:5064" class="">adaqsc.jlab.org:5064</a>, Ignored: <a href="http://cagwops.acc.jlab.org:5064" class="">cagwops.acc.jlab.org:5064</a>"<br class="">
> <br class="">
> Source File: ../cac.cpp line 1320<br class="">
> <br class="">
> Current Time: Mon Jun 27 2022 10:17:39.155967571<br class="">
> <br class="">
> <br class="">
> <br class="">
> Regards,<br class="">
> <br class="">
> Marc McMullen<br class="">
> <br class="">
> Sr. Instrumentation Designer<br class="">
> <br class="">
> Detector Support Group<br class="">
> <br class="">
> <a href="tel:(757) 269-7738" class="">(757) 269-7738</a><br class="">
<br class="">
-- <br class="">
Brad Sawatzky (he/him), PhD <<a href="mailto:brads@jlab.org" class="">brads@jlab.org</a>> -<>- Jefferson Lab/SciComp/C111<br class="">
Ph: <a href="tel:757-269-5947" class="">757-269-5947</a> -<>- Fax: <a href="tel:757-269-5235" class="">
757-269-5235</a> -<>- Pager: <a href="mailto:brads-page@jlab.org" class="">brads-page@jlab.org</a><br class="">
The most exciting phrase to hear in science, the one that heralds new<br class="">
discoveries, is not "Eureka!" but "That's funny..." -- Isaac Asimov<br class="">
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