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<== Date ==> <== Thread ==>

Subject: Re: pv Access setup
From: Michael Davidsaver via Tech-talk <tech-talk at aps.anl.gov>
To: "Hu, Yong" <yhu at bnl.gov>
Cc: Дмитрий Прощенко <proshchenko78 at yandex.ru>, "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov>
Date: Mon, 19 Apr 2021 09:27:39 -0700
Hi Yong,

On 4/19/21 6:43 AM, Hu, Yong wrote:
...
> “127.255.255.255” is not the right broadcast. Assuming you are using Linux, the output of /sbin/ifconfig does NOT have “127.255.255.255” as broadcast for the interface “lo”.

fyi. the (implicit) loopback broadcast address is a semi-documented Linux specific behavior.
It is doesn't need to be explicitly configured, it is always active.

Using 127.255.255.255 for searching works great with the CA implementations I've tested,
also my new PVXS implementation of PVA.  I've found this "trick" handy for local testing.

However, it doesn't work with the pvAccessCPP implementation of PVA due to a quirk which is
related to Klemen's recent problem with global broadcasts.

References:
pv Access setup Дмитрий Прощенко via Tech-talk
Re: pv Access setup Michael Davidsaver via Tech-talk
Re: pv Access setup Дмитрий Прощенко via Tech-talk
Re: pv Access setup Hu, Yong via Tech-talk

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