Last Updated December 15, 2011
VMware ESXi 5.0 on physical host servers and vCenter 5.0 for NETLAB+ VM
management are not recommended or supported at this time due to several
VMware ESXi 4.1 U2 is currently recommended for physical host servers.
VMware vCenter 4.1 is currently recommended for NETLAB+ VM management.
VMware ESXi 5.0 and vCenter 5.0 are supported as virtual machines running
in NDG ICM 5; the physical host servers that host ICM 5 pods are required
to run ESXi 4.1 U2 to support this environment.
Known Issues with ESXi 5.0 and NETLAB+
The following known issues have delayed support for ESXi 5.0 support on physical
host servers. Although NETLAB+ will interoperate with vSphere 5.0, it is not currently
supported for the reasons listed here.
- System performance on ESXi 5.0 may significantly degrade when booting more than 15
VMs at once. The vmkernel reports high disk latency and may further degrade after
subsequent invocations of the same pods. This issue does not occur on ESXi 4.1 U2.
The effective impact of this issue is shown in the table below. The time required to
boot 8 ICM 5.0 pods on ESXi 5.0 (physical server) significantly increases after the
second and third invocations. This would mean that a user could wait between 5 and 9
minutes for a pod to initialize (depending on when the pod was scheduled). The
same pods on ESXi 4.1 U2 (physical server) are not affected and actually improve after
the first boot (due to thin provisioning).
- When using the NETLAB+ Remote PC Viewer Version 2, users will experience a double
mouse cursor; one local mouse and one remote mouse. This issue does not occur with
ESXi 4.1 U2. The correct behavior is to render only a local cursor in most cases.
- The built-in ESXi firewall blocks all NETLAB+ remote display (VNC) traffic, even
though NETLAB+ configures remote display ports through the vSphere API. This can
be worked around by allowing most ports through the ESXi firewall.
Known Issues with vCenter 5 Virtual Appliance and NETLAB+
- Embedded database only support 5 hosts and 50 VMs. Most NETLAB+ sites working
with virtual pods will easily exceed 50 VMs.
- Only Oracle is supported as external database. Microsoft SQL Server is not