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OpenStack Networking Cookbook by Chandan Dutta Chowdhury, Sriram Subramanian

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Troubleshooting a VM that does not get a DHCP IP address

In this recipe, we will troubleshoot a scenario where a VM on OpenStack that is connected to a DHCP enabled virtual network is unable to obtain an IP address.

When a tenant attaches the first VM to a DHCP enabled virtual network in OpenStack, Neutron automatically starts a DHCP server for the virtual network. This DHCP server is responsible for providing an IP address to the VM instances created on the virtual network.

Once a VM instance attached to a virtual network boots up, it is assigned an IP address from the DHCP server. In this recipe, we will see some of the possible reasons for a VM instance failing to receive an IP address.

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