To configure High Availability for DHCP, complete the following:
- Create an HA Group: Create an HA group and add two existing Hosts to the group. This creates an HA pair. For information on creating an HA Group, see Configuring HA Groups.
- Create an IP Space: Go to Manage -> IPAM/DHCP -> Address Spaces. Click Create -> IP Space. Configure the settings and click Save and Close. For information on creating an address space, see Configuring IP Spaces.
- Create a Subnet and Assign the HA Group to the Subnet: Go to Manage -> IPAM/DHCP -> Address Spaces. Click Create -> Subnet. Select the newly created IP Space for IP Space and the HA Group for Host. Click Save and Close. For information about creating a subnet, see Configuring Subnets.
The HA with two Hosts is now complete.
Note
You must select different hosts for an HA group.
- A host must use only one IP space.
A host associated with an HA group cannot be associated with another in Active/Active and Active/Passive mode.
- A host can be associated with multiple HA groups in Advanced Active/Passive mode.
A host that is part of an Active/Active or Active/Passive HA group cannot have subnets and ranges of its own. The host cannot have subnets or ranges that are not associated with the HA group. A host that is part of an Advanced Active Passive HA group is allowed to have subnets and ranges of its own.
- The hosts (Node 1 and 2) must be able to communicate with each other on the specified ports. Any firewall settings must allow traffic on the specified ports.
- All ranges within a given subnet must be assigned to the same host or HA group as the parent subnet.