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IP Allocation and DNS Record Creation
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IP Allocation and DNS Record Creation

Owned by Jyothi KP
Last updated: Aug 01, 2022

This includes the following extensible attributes (EAs):

  • IP Allocation Strategy: This EA is used to choose between Host Record and Fixed Address for IP allocation. If chosen for Fixed Address, DNS records associated with a fixed address are controlled by the additional EAs below.
  • DNS Record Binding Types: List of DNS records to generate and bind to a fixed address during IP allocation. Supported DNS record types are record:a (for A records), record:aaaa (for AAAA records), and record:ptr (for PTR records). This is a multi-value EA, with one of these entries per value.
  • DNS Record Unbinding Types: List of DNS records to unbind from a fixed address during IP deallocation. Supported DNS record types are the same as DNS Record Binding Types.
  • DNS Record Removable Types: List of associated DNS records to delete when a fixed address is deleted. This is typically a list of DNS records created independently of the Infoblox IPAM Driver. Supported DNS record types are record:a, record:aaaa, record:ptr, record:txt, and record:cname.

Note

  • A DHCP port IP is an exception to this. The DHCP port IP is created as a host record with DHCP disabled to allow IP aliasing, regardless of IP Allocation Strategy configuration. IP aliasing is used in OpenStack when multiple subnets are created in the same network. Each subnet requires a DHCP port IP and those IPs are all assigned to the same DHCP port, but only one MAC address exists. If IPAM only support configuration is used, DNS is disabled as well for the host record.
  • When creating a router on Openstack in a high availability (HA) setup, Openstack creates a HA Network which has a /18 CIDR. You must remove record:ptr before creating the router to prevent failure of router creation.




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