As Alan mentioned, VIPA won't accomplish this.  But, there are Open Source
packages that will allow you to set up a High Availability (HA) cluster with
your Linux/390 guests.  Tivoli Systems Automation will certainly do the job,
but at a much, much higher cost.


Mark Post

-----Original Message-----
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of
Alan Schilla
Sent: Tuesday, December 07, 2004 10:58 AM
To: [EMAIL PROTECTED]
Subject: VIPA and hot standby


> Hi, I have been looking over the list for an example of what I wish to
> accomplish but have not seen this particular config. I am running SLES 8
> under zVM 4.4. I have installed VSWITCH with 2 vswitch controllers in case
> one fails or I must take one down. These are associated with 2 gige
> OSA-Express each connected to a separate Cisco 3550 running HSRP. This
> gives me a hot standby switch in case my primary Cisco fails. I want to
> extend this to WAS edge servers under linux where 2 linux guests are
> running edge server. If the primary were to fail the second or secondary
> would automatically pick up the inbound requests. I have been told to use
> vipa. How do I configure the duplicate addresses? How does linux
> "heartbeat" between the 2 servers and identify the loss of the primary?
> How does the secondary "giveback" when the primary returns? Would I be
> better off to load-share and use DNS round-robin against duplicate servers
> rather than hot standby?  Are there any SHARE docs or other documentation
> that give an example of how this is configured?
> Thanks For Your Help,
> Al Schilla
> State of Minnesota

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