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Subject: Re: ioc running on a server with a private network
From: Dirk Zimoch <[email protected]>
To: Kevin Tsubota <[email protected]>
Cc: EPICS Tech Talk <[email protected]>
Date: Tue, 09 Dec 2008 10:06:02 +0100
Hello,

By default, channel access uses all broadcast addresses it finds on the host. That means an IOC is server on both network cards and a client searches on both network cards. Thus, when client and IOC run on the same machine, you get duplicate channel warnings. Setting EPICS_CA_AUTO_ADDR_LIST=NO and EPICS_CA_ADDR_LIST=’primary IP’ on hosts with two network cards is the correct way to solve this problem. Best do it automatically for every user in a script in /etc/profile.d/.

Dirk

Kevin Tsubota wrote:
Hi All,



I have an R3.14.9 Unix IOC running on a Solaris-8 host that actually has two IP addresses. The 2^nd IP is setup for a private network.

When I access a channel from this IOC, it warns me about multiple IOCs and references both IP addresses assigned to this server, the primary address and the private network address.



I have worked around it by using EPICS_CA_AUTO_ADDR_LIST=NO and EPICS_CA_ADDR_LIST=’primary IP’ but am curious why this is happening and if there is another way around this.



Thank you,

Kevin Tsubota

W.M. Keck Observatory


-- Dr. Dirk Zimoch Paul Scherrer Institut, WBGB/006 5232 Villigen PSI, Switzerland Phone +41 56 310 5182

References:
ioc running on a server with a private network Kevin Tsubota

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