The Point-to-Point Protocol (PPP) provides a standard method of encapsulating network-layer protocol information over point-to-point links. PPP also defines an extensible Link Control Protocol@ and proposes a family of Network Control Protocols (NCPs) for establishing and configuring different network-layer protocols. The IPv6 Control Protocol (IPV6CP)@ which is an NCP for a PPP link@ allows for the negotiation of desirable parameters for an IPv6 interface over PPP. This document defines the IPv6 datagram compression option that can be negotiated by a node on the link through the IPV6CP.