Alan,

Thanks for your help! 

But what will happen if the zLinux use dedicated OSA devices directly in stead 
of vswitch? It still need layer2 support?  As my understanding, it should be 
different case, right? 

Anson Y.



________________________________
发件人: Alan Altmark <[email protected]>
收件人: [email protected]
已发送: 2009/9/22(周二), 下午10:36:05
主 题: Re: Re: Does OSA Express2 Ethernet su pport z VM layer2

On Tuesday, 09/22/2009 at 09:55 EDT, Anson <[email protected]> wrote:
> Having seen those mails, I still don't know exactly if z900 OSA Express 
can 
> support both layer2 and layer3 on the same port.... 
>  
> Wich mode will be used if the zLinux guest use the dedicated osa devices 
in 
> stead of vswitch? 
>  
> Maybe z900 is too old....

I just checked the OSA-Express Customer Guide and Reference and you are 
correct, z900 is too old:

Beginning with the May 2006 version of Licensed Internal Code on z890, 
z990 and z9 systems only, this restriction has been lifted. With this 
version of Licensed Internal Code, a layer 2 host can directly communicate 
with a layer 3 host sharing the same OSA-Express port.

Hardware requirements 
- z890 or z990 and above only 
- OSA-Express with Licensed Internal Code level October 2004 or higher
- OSA-Express2, all levels
- OSA-Express3, all levels
- OSD only

Alan Altmark
z/VM Development
IBM Endicott



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