Qnet relies on each host having a unique hostname, for database
indexing purposes.  It should be documented.  You should configure
your hosts with unique hostnames.  You should not rely upon this
hack in Qnet.
 
--
aboyd

________________________________

From: Mario Charest [mailto:community-noreply@qnx.com]
Sent: Fri 8/6/2010 10:36 AM
To: general-networking
Subject: RE: default hostname



For sake of argumentation:

I have never seen anywhere in the documentation that giving a hostname other the one generated automatically is a 
requirement for reliability.  Funny, I find that by using three bytes only, qnet is relying on emergency handbrake.

-----Message d'origine-----
De : Andrew Boyd [mailto:community-noreply@qnx.com]
Envoyé : 6 août 2010 13:23
À : general-networking
Objet : RE: default hostname

You should keep in mind that qnet really has no right to be changing the hostname.  I put that hack in there as kind of 
an emergency backup to make qnet work in case people didn't correctly configure their systems with proper hostnames.

You really shouldn't be relying on emergency backups as part of your normal ops.  Would you drive around with no front 
brakes in you car, hoping that you emergency handbrake on the rear drums would do the job?

Anyways, the odds of having two boards with the same lower 3 bytes is right up there with me winning the lottery next 
week, and I've never purchased a lottery ticket in my life  :)

--
aboyd

________________________________

From: Mario Charest [mailto:community-noreply@qnx.com]
Sent: Fri 8/6/2010 10:10 AM
To: general-networking
Subject: RE: default hostname



Unlikely but possible.  I`d prefer not having to worry if in 10 years from now we need to swap a computer at a customer 
site.  If Murphy can bite, it will ;-)  That being said, I don`t care because it is a requirement of our design to 
specify a unique name for each computer we ship.  But I`m told some people are concerned .

-----Message d'origine-----
De : Andrew Boyd [mailto:community-noreply@qnx.com]
Envoyé : 6 août 2010 12:41
À : general-networking
Objet : RE: default hostname

Given that the top 3 bytes are manufacturer ID, using all six really wouldn't make much difference unless you have the 
same bottom 3 bytes from the different manufacturers which is somewhat unlikely.

--
aboyd

________________________________

From: Mario Charest [mailto:community-noreply@qnx.com]
Sent: Fri 8/6/2010 5:55 AM
To: general-networking
Subject: default hostname



Default hostname is generated using the last 3 bytes of the MAC address.  Wouldn`t it be safer to use all 6 bytes given 
that qnet goes offline if the hostname/domain isn`t unique?



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General
http://community.qnx.com/sf/go/post61988







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General
http://community.qnx.com/sf/go/post62069





_______________________________________________

General
http://community.qnx.com/sf/go/post62085






_______________________________________________

General
http://community.qnx.com/sf/go/post62092




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General
http://community.qnx.com/sf/go/post62096