IPv6 Feature Support
Current information for IPv6 support on the Palo Alto Networks firewall is available at the link below. For further information, a link to a white paper on IPv6 is available at the bottom of the page.
Secure IPv6 Environment - Palo Alto Networks
IPv6 Feature Support for PAN-OS 4.1 - 7.0
IPv6 RFCs Support for PAN-OS 5.0