Thanks to all for the answers. My main concern was the need for more bandwidth than a physical osa can handle, you cleared that up perfectly.
You also managed to read my mind and answer some other questions I had about how a Linux guest would chose to use all the different network interfaces. -----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Mark Post Sent: Friday, November 09, 2007 3:46 PM To: [email protected] Subject: Re: Using more than one OSA >>> On Fri, Nov 9, 2007 at 3:31 PM, in message <[EMAIL PROTECTED] an.com>, "Rodriguez, Oscar" <[EMAIL PROTECTED]> wrote: > From the presentations online, I've read how you can use a VSWITCH to > provide failover capabilities if an OSA card fails. True, but only if you're running z/VM. > My question is can 1 Linux guest use multiple OSA's at the same time > ? You can define multiple network interfaces, of various types, for any one Linux system. This may be desirable for things such as routing some traffic over a HiperSocket to z/OS or z/VSE, while routing other traffic only between the Linux guests via a "private" guest LAN or disconnected VSWITCH, and the remaining traffic outside of the box. There are lots of possibilities there. > For z/OS we have one VIP and several OSA cards. From the netstat > dev, I can see that the traffic for that VIP gets spread over these > OSA cards. > > Just wondering if it's possible under z/Linux. Yes, but primarily useful for LPAR installs, not on z/VM. With z/VM, you can get similar benefits to VIPA without all the hassle. If you have a need for more network bandwidth than can be delivered via one real OSA, then you need to have z/VM 5.3 installed for the network link aggregation support it can provide. The only real caveat there is that any OSA port involved in link aggregation cannot be shared with other LPARs. Mark Post ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - This message is intended only for the personal and confidential use of the designated recipient(s) named above. If you are not the intended recipient of this message you are hereby notified that any review, dissemination, distribution or copying of this message is strictly prohibited. This communication is for information purposes only and should not be regarded as an offer to sell or as a solicitation of an offer to buy any financial product, an official confirmation of any transaction, or as an official statement of Lehman Brothers. Email transmission cannot be guaranteed to be secure or error-free. Therefore, we do not represent that this information is complete or accurate and it should not be relied upon as such. All information is subject to change without notice. -------- IRS Circular 230 Disclosure: Please be advised that any discussion of U.S. tax matters contained within this communication (including any attachments) is not intended or written to be used and cannot be used for the purpose of (i) avoiding U.S. tax related penalties or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein. ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
