One of the most confusing aspects of vSphere environment
is the way ESXi handles uplinks and failovers... making
the approach familiar to networking engineers
(Port channel/LAG) the worst possible option.
vSphere offers basic VLAN-based virtual networking
isolation. This section describes how you can use
VLANs in ESXi virtual switches and how to configure
access or trunk ports connecting virtual machines to the
ESXi hypervisor uses internal NICs (VMkernel adapters)
to connect to the virtual switch and through it to the
outside world. This section describes some of the interesting
details, including custom TCP stacks.
One of the most appreciated vSphere features is the ability
to move a running virtual machine between hypervisors (vMotion)
and the ability to move VM disks between storage systems
(Storage vMotion). You'll find behind-the-scenes view of
how these features work in this section.
ESXi hypervisor includes baseline networking security features,
including MAC address checks and simple ACLs. Advanced security
features and integration with third-party products is available
with VMware NSX.
This section describes Cisco's additions to vSphere networking.
Most of the features described in this section won't be supported
in upcoming vSphere releases - use this section solely for