Thank very much!



David Boyes <[EMAIL PROTECTED]>
Sent by: Linux on 390 Port <[email protected]>
11/18/2008 03:38 PM
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Linux on 390 Port <[email protected]>


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Re: z/VM issues after replicating DASD to DR site






> When z/VM ipls, CP is using the production system and
> some parameters don't work in DR... For example,
>
> 1) SYSTEM CONFIG has System_Identifer_Default ZVMCS1,  we want our DR
to
> be ZVMCS3

Assuming that your DR system has a different CPUID, you can make
statements in the SYSTEM CONFIG conditional on the CPUID, and have one
default if it can't figure out what the CPUID should be.

Make sure you also update SYSTEM NETID on the CMS S-disk as well.

> 2) I see duplicate MAC addresses on OSA,,, I found the VMLAN MACPREFIX
> statement, but since it goes in SYSTEM CONFIG, that brings me back to
the
> first issue again.

See above. You can create IF ZVMCS1 then MACPREFIX setups using the
conditional System_Identifier syntax.

> 3)   TCPIP profile needs a different IP address, maskl and Gateway at
our
> DR site.

TCPIP supports the same idea. You can make statements conditional in
PROFILE TCPIP or have a separate <nodeid> PROFILE file for DR. TCPIP
will start the one that is most closely matched (<nodeid> PROFILE if it
exists, PROFILE TCPIP if there isn't any matching file).

> 4) If we make any of the changes above on the DR system, they will get
> over-written because the DASD replicates constantly.

The above approach can be used here because you can have them in the
production system too, and they only become active when you start the
system on the DR CPU.

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