P6 boxes are still a bit new to all of us, and unfortunately, I dont always have access to one, so I cannot check all of this.
As you have allocated all resources to a single partition (a 'classic' SMP server as it were) I would ignore all the references to lhea - logical host ethernet adapter. In all honesty though, I do not know how the system will react to lhea when all resources are assigned.
Further - have you done an install, or is this a clone/preinstalled image? It may be that there are many interfaces that are defined, but not available (although as I type this I recall that entstat -d only works with Available interfaces).
I'll do some tests on p5 boxes with AIX 5.3 and AIX 6.1 - although the AIX 6.1 systems will not have any physical resources (VIOS is still AIX 5.3 atm) - and see if I can find similar differences.
And I'll repeat these when I get access to a p6 system again.
p.s. when I read Integrated Virtual Ethernet - I thought "Virtual Ethernet", and realize that this is about what the 'techies' refer to as HEA and lhea - Host Ethernet Adapter and Logical Host Ethernet Adapter.
please include some information about what settings you used to setup and define the HEA and LHEA for the managed system, and the partition - respectively.