ISC DHCP failover enhances DHCP service reliability by establishing redundancy between servers. Key features include failover relationships for synchronized configuration, scope-level management for granular control, and visible address pool failover status. Additionally, you can customize scope behavior on the secondary server during deletion and select failover relationships during creation.
Refer to the following topics for instructions on how to manage failove relationships for ISC DHCP servers:
- Adding failover relationships for ISC DHCP
- Adding or removing scopes from an ISC DHCP failover relationship
- Editing or removing failover relationships for ISC DHCP
Viewing ISC DHCP failover relationships
You can view existing ISC DHCP failover relationships at the server level. Micetro automatically detects and syncs all existing failover relationships.
Additionally, you can retrieve failover relationships through the API using the
command GetDHCPFailoverRelationship(s).
To view failover relationships in Micetro:
- On the Admin page, select the Service management tab.
- Select the server you want to view in the data grid. You can use the filters in the left sidebar to filter the grid for ISC DHCP services only.
- Use either the Action or Row … menu to select Manage failover.
- The dialog displays all relationships associated with the selected server.
For ISC DHCP services, scopes engaged in failover relationships are grouped and labeled as such in the Authority column of the IPAM data grid after you apply the DHCP scopes filter in the left sidebar.The Failover relationship column displays the name of the specific failover relationship the scope belongs to. Additionally, the Inspector displays failover information for the selected server.
The DHCP scope details section in the Inspector displays the failover relationship on address pools for ISC servers. This information includes the name and servers associated with the failover relationship.
It's also possible to view failover relationships for ISC DHCP scopes that participate in failover when managing address pools. In the Manage DHCP pools dialog, a Failover column displays the scope's failover relationship.
It's not possible, however, to change the failover relationship when adding or editing a pool. The Failover relationship field will be read-only.