Unlike the traditional ESX software, the ESXi software does not have a service console. It helps reduce the installation footprint of the software and can allow the hypervisor to be directly installed on the system’s internal flash storage or a USB key.

At the moment I am investigating moving to ESXi from ESX, after resolving the DSET issue I was then faced with the management of the ESXi hosts, currently the full fat ESX hosts have the Dell open management agent installed on them and SNMP configured, this allows the Dell management server to keep track of the underlying hardware and report any hardware issues or firmware updates.

But what happens with ESXi 4.0 and the removal of the service console ?

Earlier with ESXi 3.5, OpenManage component were integrated with the downloadable Dell ESX3i ISO image
but from ESXi 4.0 onwards, VMware introduced a new concept called vSphere Installation Bundle (VIB), this allows the end users to download VIB files and install it directly into ESXi 4.0. Dell are now posting their OpenManage component as a VIB on support.dell.com.

--> The rest is on :

http://www.virtu-al.net/2010/03/17/dell-esxi-management/