Experimental Physics and
Industrial Control System

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

Subject:	How to resolve CA beacon routing error messages when rebooting IOC is not helping
From:	"Tang, Johnny via Tech-talk" <[email protected]>
To:	"[email protected]" <[email protected]>
Cc:	"Tang, Johnny" <[email protected]>
Date:	Tue, 7 Jul 2020 21:52:32 +0000

Many of our operational IOCs at SNS are flooded with following CA error messages:

…

./online_notify.c: CA beacon routing (connect to "172.31.127.255:5065") error was

"S_errno_EHOSTUNREACH"

../online_notify.c: CA beacon routing (connect to "172.31.75.255:5065") error was

"S_errno_EHOSTUNREACH"

../online_notify.c: CA beacon routing (connect to "172.31.83.255:5065") error was

"S_errno_EHOSTUNREACH"

../online_notify.c: CA beacon routing (connect to "172.31.91.255:5065") error was

"S_errno_EHOSTUNREACH"

../online_notify.c: CA beacon routing (connect to "172.31.127.255:5065") error was

"S_errno_EHOSTUNREACH"

../online_notify.c: CA beacon routing (connect to "172.31.75.255:5065") error was

Like to hear any related experiences from anyone to resolve this or redirect the messages:

Thanks.

Johnny Tang

Spallation Neutron Source

Oak Ridge National Laboratory

Replies:: Re: How to resolve CA beacon routing error messages when rebooting IOC is not helping Hu, Yong via Tech-talk

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ANJ, 19 Mar 2026