Upgrade and Downgrade Considerations
- When a router is upgraded to the version of software that supports this feature DHCPv6 Relay Agent Prefix Delegation Notification, the saved information about delegated prefixes will be examined and if the delegated prefix lifetime is not expired, then the prefix will be added to the IPv6 static route table.
- When a router is downgraded to the version of software that does not support DHCPv6 Relay Agent Prefix Delegation Notification, the saved information about delegated prefixes is retained and it cannot be used.