asr activate_asset for PCA / OVCA

For OVCA otherwise called PCA I need to activate the compute nodes. I can only use the ILOM address as follows, but no host name.

$ activate_asset -i 192.168.4.127

ORACLESP-<1111aaa11a> : 1 service tags

Successfully submitted activation for the asset

Host Name: ORACLESP-1111aaa11a

IP Address: 192.168.4.127

Serial Number: 1111aaa11a

Why can't I use a host name with -h?

In my assets list, the host name is "ORACLESP-1111aaa11a" which is not the host name.

Second question, why can't I  add the management ip number, similar to exadata compute nodes.  I cannot find any documentation about this.