Editing or removing failover relationships for ISC DHCP - User Guide - Micetro - 25.2.0

Micetro Admin Guide
ft:locale
en-US
Product name
Micetro
Version
25.2.0

Micetro enables you to edit and/remove failover relationships from ISC DHCP servers, as needed, either in Micetro or through the Micetro API.

Editing failover relationships

You can edit ISC failover relationships on a per-relationship basis, either in the Web Application or through the API.

To edit a failover relationship:

  1. On the Service management tab of the Admin page, select the server containing the relationship you want to edit.
  2. Use either the Action or Row … menu to select Manage failover.
  3. Select the relevant relationship in the dialog, and then use the Row ... menu to select Edit.
  4. Modify the failover relationship as needed and then select Save.
  5. Select Save.

-OR-

  • Use the API command ModifyDHCPFailoverRelationship, which uses the following parameters:
    • Name: The name of the DHCP failover relationship to be created.
    • PrimaryServer: The name of the primary DHCP server as it appears in Micetro.
    • SecondaryServer: The name of the secondary DHCP server as it appears in Micetro.
    • Mclt: Specify the number of seconds for which a lease can be renewed by either server without contacting the other.
    • Port: Specify the port number on which the server should listen for connections from its failover peer.
    • LoadBalanceMaxSeconds: Specify the cutoff in seconds, after which load balancing is disabled. This ISC documentation recommends a value of 3 or 5.
    • MaxResponseDelay: Specify the number of seconds that may pass without the server receiving a message from its failover peer before it assumes that the connection has failed.
    • MaxUnackedUpdates: Specify the number of messages the server can send before receiving an acknowledgment from its failover peer. According to ISC documentation, 10 seems to be a good value.

Removing failover relationships

You can remove a failover relationship from an ISC DHCP server either in the Web Application or through the API.

To remove a failover relationship:

  1. On the Service management tab of the Admin page, select the server whose failover relationship you want to remove.
  2. Use either the Action or Row … menu to select Manage failover.
  3. Select the relevant relationship, and then use the Row ... menu to select Remove.
  4. In the confirmation dialog, use the dropdown to select whether the secondary scopes should be disabled or deleted.
  5. Select Confirm.
  6. Select Save.

-OR-

  1. Use the API RemoveDHCPFailoverRelationships.
  2. Specify a reference to the ISC DHCP service, the name of the failover relationship, and the propert deconfigure action.