ironic/releasenotes/notes/add-dual-stack-dhcp-opts-6dc18ae10aeb599a.yaml
Mohammed Naser 367cdcd665 Add both IPv4 and IPv6 DHCP options if interface has both
It is possible that an interface has both IPv4 and IPv6 addresses,
primarily when using SLAAC with OpenStack Neutron.  When this is
the case, it is very likely that the first fixed IP would be a
SLAAC assigned port and the second IP is the IPv4 address.

In an environment where you are looking to boot via IPv4, no DHCPv6
infrastructure exists as IPv6 connectivity is provided via SLAAC,
you would not be able to use this network to boot off of.

This patch instead grabs all the fixed IP addresses, then inserts
the options that match the IP versions which are attached to the
interface, potentially resulting in both IPv4 and IPv6 options
being included (though the IPv6 ones would be largely omitted).

In environments where only IPv4 or IPv6 is in use on the port, it
will still only insert the options for those specific IP versions.

Story #2008660
Task #41933
Change-Id: I52e4ee022b17cb7f007534cb368136567b139a34
2021-02-26 23:39:44 +00:00

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YAML

---
fixes:
- When using the Neutron DHCP driver, Ironic would only use the first fixed
IP address to determine what IP versions are use on the port. Now, it
checks for all the IP addresses and adds DHCP options for all IP versions.