This document proposes a solution to PCP Server Discovery problems in
Proxy Mobile IPv6 (PMIPv6) networks when both home network traffic
and traffic off-loaded to local access network require traversing a
gateway implementing NAT and/or Firewall. This draft proposes
enhancements to DHCPv4 Relay Agent by introducing a new sub-option
under DHCPv4 Relay Option and to PMIPv6 signaling through additional
options to Proxy Binding Update/Acknowledgement messages.