Re: Is it possible to put 2 subnets on 1 phy osa card
As usual it depends on how you are set up now...one Physical OSA card has two ports...you could could segregate the two subnets by port...lots of things like QDIO or Passthru and what applications use what...load balancing turned on in your IP stack etc etc...there are some very good OSA redbooks out there. -Original Message- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of larry macioce Sent: Wednesday, October 21, 2009 9:02 AM To: IBM-MAIN@bama.ua.edu Subject: Is it possible to put 2 subnets on 1 phy osa card A discussion has come up to move the mainframe off the old network to another.The network people said they could do a vlan segment off of thier switch and this would allow traffic to flow from either network a or network b to our osa port . The question then came up to see if we could tell out IP stack which port to speak on/to. Is this possible? What manual would I need to look into if so? thanks Mace -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Is it possible to put 2 subnets on 1 phy osa card
I seem to recall a 'Hot Topic' about this a while back. Try that resource. To answer your question: yes, it is possible. With static routing, you specify which adapter to use for outbound to various IP address(es). With dynamic routing, the first hop router supplies the list of address ranges. Even more fun is VIPA. -Original Message- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of larry macioce Sent: Wednesday, October 21, 2009 11:02 AM To: IBM-MAIN@bama.ua.edu Subject: Is it possible to put 2 subnets on 1 phy osa card A discussion has come up to move the mainframe off the old network to another.The network people said they could do a vlan segment off of thier switch and this would allow traffic to flow from either network a or network b to our osa port . The question then came up to see if we could tell out IP stack which port to speak on/to. Is this possible? What manual would I need to look into if so? thanks Mace NOTICE: This electronic mail message and any files transmitted with it are intended exclusively for the individual or entity to which it is addressed. The message, together with any attachment, may contain confidential and/or privileged information. Any unauthorized review, use, printing, saving, copying, disclosure or distribution is strictly prohibited. If you have received this message in error, please immediately advise the sender by reply email and delete all copies. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: Is it possible to put 2 subnets on 1 phy osa card
Larry The best forum for this topic is the IBMTCP-L list: quote For IBMTCP-L subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO IBMTCP-L /quote You will be able to find folk there who have done something similar to what you want to do. Configuring a single OSA feature port logically to belong to 2 VLANs is possible and, if your network infrastructure folk see this as a good migration option, you should consider using it. The issue of out (presumably our) IP stack which port to speak *on* then is a non-issue since, logically, there are two interfaces, one logically connected to each VLAN. The issue of out (presumably our) IP stack which port to speak *to* then is also a non-issue since, logically, there are two interfaces and, as always, the direction of outbound traffic depends on your routing table, whether built statically or dynamically. Is this possible? Yes. What manual would I need to look into if so? The obvious ones and one perhaps not so obvious might be helpful. The obvious ones are the following: - z/OS Communications Server IP Configuration Guide - z/OS Communications Server IP Configuration Reference - OSA-Express Customer's Guide and Reference - OSA-Express Implementation Guide (a redbook[1]) The not so obvious one is the following: - Linux on IBM zSeries and S390 VSWITCH and VLAN Features of zVM 4.4 (a redpaper) The redpaper happens to contain a very good introduction to what VLANs are all about in case you might lack this education. Chris Mason [1] Only the one redbook actually despite John Hadaway's contention that there are many! Of course, there is also an OSA-ICC redbook but that is irrelevant in the current context. And, I actually checked. There are only two other redsomethings with OSA in the title and these are short, irrelevant or both and date from 2002. On Wed, 21 Oct 2009 12:02:18 -0400, larry macioce mace1...@gmail.com wrote: A discussion has come up to move the mainframe off the old network to another.The network people said they could do a vlan segment off of thier switch and this would allow traffic to flow from either network a or network b to our osa port . The question then came up to see if we could tell out IP stack which port to speak on/to. Is this possible? What manual would I need to look into if so? thanks Mace -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
