Sun Cluster does not support this feature. 

-----Original Message-----
From: veritas-ha-boun...@mailman.eng.auburn.edu
[mailto:veritas-ha-boun...@mailman.eng.auburn.edu] On Behalf Of Sandeep
Agarwal (MTV)
Sent: Sunday, May 03, 2009 10:07 AM
To: Jim Senicka; Imri Zvik
Cc: veritas-ha@mailman.eng.auburn.edu
Subject: Re: [Veritas-ha] LLT heartbeat redundancy

>From 5.0MP3 onwards we do support cross-links. In your example if you
had a cable connecting sw1 and sw2 then the failure that you described
would be handled and LLT would still have 1 valid link between node 1
and node 4. 

-----Original Message-----
From: veritas-ha-boun...@mailman.eng.auburn.edu
[mailto:veritas-ha-boun...@mailman.eng.auburn.edu] On Behalf Of Jim
Senicka
Sent: Sunday, May 03, 2009 9:23 AM
To: Imri Zvik
Cc: veritas-ha@mailman.eng.auburn.edu
Subject: Re: [Veritas-ha] LLT heartbeat redundancy

LLT is designed to use "jeopardy" to detect the difference between
single link fail and dual link fail in most situations. Having a single
mesh may remove this capability.

Let me check on this with engineering and see if we have any more up to
date recommendations


-----Original Message-----
From: veritas-ha-boun...@mailman.eng.auburn.edu
[mailto:veritas-ha-boun...@mailman.eng.auburn.edu] On Behalf Of Imri
Zvik
Sent: Sunday, May 03, 2009 12:18 PM
To: Jim Senicka
Cc: veritas-ha@mailman.eng.auburn.edu
Subject: Re: [Veritas-ha] LLT heartbeat redundancy

On Sunday 03 May 2009 19:03:16 Jim Senicka wrote:
> This is not a limitation, as you had two independent failures. Bonding

> would remove the ability to discriminate between a link and a node 
> failure.

I didn't understand this one - With bonding I can maintain full mesh
topology - No matter which one of the links fails, if a node still has
at least one active link, LLT will still be able to see all the other
nodes. 
This achieves greater HA than without the bonding.


> My feeling is in the scenario you describe, VCS is operating properly,

> and it is not a limitation.

Of course it is operating properly - that's how it was designed to work
:)
I'm just saying that the cluster could be more redundant if it wasn't
designed that way :)

> If you have issues with port or cable failures, add a low pri
connection
> on a third network.



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