An update the networking issue was resolved. It turns out it was external to both Linux and VM! It seems a Cisco switch was set in PVLan mode that the OSA was connecting to for vswitch2
Apparently, I am told by the networking people that causes it to insert what looks like a second vlan tag into each frame and the IBM vSwitch on VM are not able to decode or understand that double tagging. The PVLan setting was turned off in the Cisco switch and networking took off, all seems to work fine after the change. Thanks to all who responded, this issue drove us a bit batty for a few days. -----Original Message----- From: Linux on 390 Port [mailto:[email protected]] On Behalf Of Peter Pauer Sent: Friday, June 04, 2010 12:46 PM To: [email protected] Subject: Linux on Z networking issue We have a customer experiencing difficulties with a s390 Linux under VM networking The Linux OS's tried are SuSe 11, SuSe 10.3 and RedHat 5.5 For test purposes on the guests we have defined Adapter 1: vswitch 1, layer 3, OSA card attached. 142.* ip address Adapter 2: vswitch 2, vlan aware, port access, layer 2, OSA card attached 10.* ip address Adapter 3: vswitch 3, vlan aware, port access, layer 2, NO OSA CARD 192.* ip address Adapter 1: is connected and working correctly between the VM guests and on the intranet. Adapter 2: is connected and not working between the VM guests also not working on the intranet. Adapter 3: is connected and working between the guests, no physical connection to the intranet. Only apparent difference between adapter 2 and adapter 3 is that an OSA card that is attached to Adapter 2. Any one have experience with a similar situation/resolution? Peter Peter P. Pauer, ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
