We have an IBM OpenPower 720 with hypervisor and a set of lpars. Earlier we got dlpar to work, at least a couple of times, but not anymore. Here's an example: Ran this on the hmc: ~> chhwres -r virtualio -m Server-9124-720-SNXXXXXXX -p mgmt -o a \ --rsubtype eth -s 11 \ -a "ieee_virtual_eth=1,port_vlan_id=1,is_trunk=1,\"addl_vlan_ids=600,601\"" HSCL294C DLPAR ADD Virtual I/O resources failed: HMC adding Virtual I/O ...... HMC Virtual slot DLPAR operation failed. Here are the virtual slot IDs that failed and the reasons for failure: 11 The dynamic logical partitioning operation failed. On the lpar "mgmt", running sles9 sp2 kernel 2.6.5-7.193-pseries64, we have the magic rpms from IBM installed: evlog-drv-tmpl-0.8-1 diagela-1.3.0.0-6 lsvpd-0.12.7-1 ppc64-utils-2.5-2 librtas-1.2-1 and the following IBM services are running: # lssrc -a Subsystem Group PID Status ctrmc rsct 5011 active IBM.ServiceRM rsct_rm 5103 active IBM.DRM rsct_rm 5110 active IBM.HostRM rsct_rm 5186 active IBM.CSMAgentRM rsct_rm 5217 active IBM.ERRM rsct_rm 5221 active IBM.AuditRM rsct_rm 5266 active ctcas rsct 7705 active IBM.SensorRM rsct_rm 7721 active IBM.FSRM rsct_rm 7722 active IBM.ConfigRM rsct_rm 7723 active So, where can I start digging? Regards, Ingvar -- Many that live deserve death. And some that die deserve life. Can you give it to them? Then do not be too eager to deal out death in judgement. For even the very wise cannot see all ends. Gandalf