http://www.rfc-editor.org/rfc/rfc3543.txt
RFC 3543: Registration Revocation in Mobile IPv4, S. Glass, M. Chandra2003-08-01T23:00:00-00:00This document defines a Mobile IPv4 Registration Revocation mechanism whereby a mobility agent involved in providing Mobile IP services to a mobile node can notify the other mobility agent providing Mobile IP services to the same mobile node of the termination of this registration. The mechanism is also usable by a home agent to notify a co-located mobile node of the termination of its binding as well. Moreover, the mechanism provides for this notification to be acknowledged. A signaling mechanism already defined by the Mobile IPv4 protocol is leveraged as a way to inform a mobile node of the revocation of its binding. [STANDARDS-TRACK]