2. Definitions
2.1. Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [RFC 2119].
2.2. Terminology
RH0: Type 0 Routing Header as defined in [RFC 2460].
IPv6 Node: A device that implements IPv6. This includes both hosts and routers as defined in [RFC 2460].
IPv6 Host: Any IPv6 node that is not a router.
IPv6 Router: A node that forwards IPv6 packets not explicitly addressed to itself.