
Colocated Care-of Address Support 173
The default behavior is for the mobile router to defer to a FA CoA, if one is available. Explicit
configuration is required for the mobile router to ignore the FA advertisements.
When the mobile router registers back to its Home Agent with a CCoA, it registers in the same
way that a Mobile Node would register. Specifically, it sets the D bit in its RRQ, as specified in
Chapter 2.
When a mobile router is using a CCoA, only one tunnel transports all traffic, as opposed to the
two tunnels needed when using a FA. The CCoA is then the remote endpoint of the tunnel
between the Home Agent and mobile router. Upon decapsulation ...