This appendix collects together answers to a selection of Frequently Asked Questions that can be helpful in solving various issues with cOS Core running under VMware.

Question Summary

1. The 2 hour cOS Core demo mode time limit has expired. What do I do?
2. Are upgrades of cOS Core done differently under VMware?
3. How do I release focus from the VMware console window?
4. Do all my virtual interfaces have to be configured as E1000 NICs?
5. How do I manage multiple virtual firewalls;?
6. How do I separate different virtual networks?
7. After restarting cOS Core, where is the new virtual network adapter that was added?
8. How much increase in throughput can SR-IOV provide?

Questions and Answers

1. The 2 hour cOS Core demo mode time limit has expired. What do I do?

cOS Core will not respond after it enters lockdown mode after 2 hours and will consume all the VMware resources. In this situation, the VMware virtual machine must be stopped and then restarted so that cOS Core restarts and enters a new 2 hour evaluation period.

2. Are upgrades of cOS Core done differently under VMware?

No. cOS Core upgrades are performed under VMware just as they would be in non-VMware environments.

3. How do I release focus from the VMware console window?

VMware keeps focus in the console window. To click outside the console window, press the key combination Ctrl-Alt .

4. Do all my virtual interfaces have to be configured as E1000 NICs?

Yes. cOS Core will not work with virtual interfaces that are not configured as an E1000. Any added interfaces must be forced to be E1000.

5. How do I manage multiple virtual firewalls?

The IP address of the management virtual Ethernet interface for cOS Core must be different for the different virtual firewalls running under a single hypervisor.

6. How do I separate different virtual networks?

If different sets of virtual machines are connected to a virtual switch through different port groups, they can be separated by making them VLANs with different VLAN IDs. This is described further in Chapter 5, Separating VLANs.

7. After restarting cOS Core, where is the new virtual network adapter that was added?

Go to Virtual Machine Properties in the VMware client and view the network adapter to verify that the checkbox Connect at power on is enabled before starting the virtual machine. If the added interface is still not detected by cOS Core, enter the CLI command:

Device:/> pciscan –cfgupdate

This will scan for any new interfaces. Then save the updated configuration with the command:

Device:/> activate

Followed by:

Device:/> commit

8. How much increase in throughput can SR-IOV provide?

The performance increase provided by SR-IOV can be dramatic if traffic both enters and leaves via SR-IOV interfaces. A quadrupling of maximum throughput is possible.