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

Subject: RE: multiple servers on the same (loopback) interface
From: Mark Rivers <rivers@cars.uchicago.edu>
To: "'Jameson Graef Rollins'" <jrollins@ligo.caltech.edu>, "Kasemir, Kay" <kasemirk@ornl.gov>, "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>
Date: Tue, 9 Jul 2013 19:04:49 +0000
The broadcast is used to send a message to find the PV.  The IOC with the PV then sends a directed (non-broadcast) respond to the client, and they communicate by normal TCP.  So the client then knows the IP address of the IOC.  But to make nice human-readable output it tries to also get the IP name of the IOC, so it looks for a DNS server.

So can just put an entry in your /etc/hosts file if no DNS server is available.

Mark


-----Original Message-----
From: Jameson Graef Rollins [mailto:jrollins@ligo.caltech.edu] 
Sent: Tuesday, July 09, 2013 1:58 PM
To: Mark Rivers; Kasemir, Kay; tech-talk@aps.anl.gov
Subject: RE: multiple servers on the same (loopback) interface

On Tue, Jul 09 2013, Mark Rivers <rivers@cars.uchicago.edu> wrote:
> This is probably the problem of DNS resolution timing out because there is no DNS server to do the reverse DNS lookup on that interface.

Hi, Mark.  But given that it's a broadcast address, it should never
resolve to any single name.  Does this mean that this is a general
problem with using a broadcast address as EPICS_CA_ADDR_LIST on the
client side?

jamie.


References:
multiple servers on the same (loopback) interface Jameson Graef Rollins
Re: multiple servers on the same (loopback) interface Kasemir, Kay
Re: multiple servers on the same (loopback) interface Jameson Graef Rollins
RE: multiple servers on the same (loopback) interface Mark Rivers
RE: multiple servers on the same (loopback) interface Jameson Graef Rollins

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