Question on Source System

[Former Member]

How did you resolve inactive Source systems when there are changes to IP addresses/server names?

Some sites may upgrade the R/3 h/ware (and usually don't tell the BW teams).The source RFC logical names will be the same but the actual underlying h/ware may have changed IP address or host/server names. How did

the BW teams recover (after all the cussing)?

Are there any proactive steps that can be done for seamless IP address changes

TQ

Kumar

[Former Member]

Hmm, why the need to maintain IP addresses?

We use DNS Aliases for our servers, as long as the DNS alias resolves to a valid hostname you NEVER need to maintain IP addresses on the BW SM59 connections.

[Former Member]

Hi Somckit,

That is ok as long as the other Server is not running. My scenario is if both Servers are running with different I.P. Address but the same Host Name.

--Jkyle

[Former Member]

Hmm, not sure what you're saying...

Also regarding restarting BW -- all you need to do is reset the hostname buffer (sm51) no need to restart the server.

SAP is just buffering the hostname...

[Former Member]

Hi Somckit,

Thanks for the Info, I did know that theres a way to reset the Host Name buffer w/o restarting it.

Anyway, regarding HOST NAMES, our live R/3 is being Flash Copied to another Server as a Standby Back up in case R/3 goes down. This Flash Copy is an exact MIRROR of the live R/3. The BASIS team set this Server to have a different I.P. Address (to be able to co-exist in the domain w/ the live Server) however, they share the same Host Name.

--Jkyle

[Former Member]

Right we do the same thing (what you refer to flash copy we term BCV copy using EMC technology).

We have no issue whatsoever using DNS aliases. Oh well I guess it works well for you guys.

Nice talking to you...

[Former Member]

Hi Nantha,

We always do this IP Change thing when we INIT our Data Sources. We practiced a <i>Minimized Downtime</i> procedure by producing a FLASH COPY of R/3 to another Server and connecting BW to it. (<i>Same Host Name but different I.P. Address</i>)

Under Transaction <b>SM59</b>, maintain the new I.P. address of the Server with the same Host Name. But the catch here is you have to restart BW since base from our experience, BW still connects to the old I.P. Address (I think it has something to do with Buffers retained in memory).

After you reboot, it should now work...

--Jkyle