Michael, Are you planning on eventually going to a full VIPA configuration as active/active? If not, consider just removing the VIPA configuration, assign IP addresses to each card, start them both and point your client community to one of the cards. That was the basic setup I had at a prior site - with the intention of setting up a full VIPA but never got around to it. I had some FTPs specifically going thru the second card so I know they were both active. Somebody kicked a cable and my primary OSA port went dark. The second OSA did an ARP takeover without the users even knowing it had happened. We happened to see the ARP takeover messages on the console is how we initially knew it had occurred. Once the cable was repaired/reinstalled the primary card did an ARP takeover automatically so everything was back to original state. I had to do nothing for the failover or failback.
Needless to say I was pleasantly surprised. Rex -----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Michael Babcock Sent: Thursday, June 29, 2023 8:37 AM To: [email protected] Subject: [EXTERNAL] Question for the List regarding OSA cards Hopefully there are some network gurus on IBM-MAIN. We have an LPAR that has two OSA Express6 cards (latest cards with a z15) defined. Both interfaces are defined in the TCPIP Profile data set. We also have a VIPA address defined. The PRIMARYINTERFACE is set to the VIPA address. The START for one of the cards is commented out. As such, the LPAR uses the card that was started at IPL time and the other one is inactive (CARD1 is active, CARD2 is inactive since there is no START for it). All traffic goes through the single OSA at this point. The IPCONFIG statement has NOMULTIPATH. We want to get to an ACTIVE/STANDBY configuration such that both cards are STARTED but all inbound and outbound traffic goes through CARD1 and CARD2 is doing nothing (so if CARD1 fails, CARD2 takes over). We also use CISCO's ACI so we experience the "flapping" issue with both cards ACTIVE/ACTIVE and MULTIPATH active (hopefully ACI is going away soon). If we start the second card, we see traffic going through both cards (which causes ACI a little heartburn). How do we achieve our goal? Keep in mind I'm not a network guy. Here's some of the config statements in the TCPIP profile if that helps. IPCONFIG SEGMENTATIONOFFLOAD CHECKSUMOFFLOAD QDIOACCELERATOR QDIOPRIORITY 1 PATHMTUDISCOVERY IGNOREREDIRECT NODATAGRAMFWD NOMULTIPATH SOURCEVIPA SYSPLEXROUTING DYNAMICXCF ZZZ.ZZZ.ZZZ.ZZZ 255.255.255.0 1 INTERFACE LINK0506 DEFINE IPAQENET PORTNAME DEV0500 INBPERF DYNAMIC WORKLOADQ IPADDR XX.XXX.XXX.XXX/24 VLANID 108 VMAC ROUTEALL MTU 1492 SOURCEVIPAINT VIPAL06 INTERFACE LINK0906 DEFINE IPAQENET PORTNAME DEV0900 INBPERF DYNAMIC WORKLOADQ IPADDR XX.XXX.XXX.YYY/24 VLANID 108 VMAC ROUTEALL MTU 1492 SOURCEVIPAINT VIPAL06 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- The information contained in this message is confidential, protected from disclosure and may be legally privileged. If the reader of this message is not the intended recipient or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any disclosure, distribution, copying, or any action taken or action omitted in reliance on it, is strictly prohibited and may be unlawful. If you have received this communication in error, please notify us immediately by replying to this message and destroy the material in its entirety, whether in electronic or hard copy format. Thank you. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
