Question: In IPv6 Prefix Delegation via DHCPv6 for a PDN connection, what happens when the MS indicates support for prefix exclusion and the delegated prefix includes the /64 prefix allocated to the PDN Connection?
Option 1: The GGSN allocates an additional, separate /64 prefix for the MS.
Option 2: The GGSN ignores the prefix exclusion feature and delegates the entire prefix as is.
Option 3: The MS is denied additional IPv6 prefixes due to potential address space conflicts.
Option 4: The GGSN utilizes the prefix exclusion feature, delegating the prefix while excluding the /64 prefix already allocated to the PDN Connection.
Explanation: According to DHCPv6 Prefix Delegation specifications, when a Mobile Station (MS) indicates support for prefix exclusion and the prefix to be delegated includes the previously allocated /64 prefix, the Gateway GPRS Support Node (GGSN) must utilize the prefix exclusion feature, excluding the already allocated /64 prefix from the delegated prefix.