Address Mapping of IPv6 Multicast Packets on Ethernet
updates
- rfc-2464 — Transmission of IPv6 Packets over Ethernet Networks
Extracted elements (5)
The unicast link-layer mapping does not replace the multicast mapping described in RFC 2464 Section 7; it is an additional permitted mapping. The determination of the unicast Ethernet link-layer address and construction of the outgoing IPv6 packet are explicitly left out of scope.
This document updates RFC 2464 (Transmission of IPv6 Packets over Ethernet Networks) by extending Section 7's address mapping rules to allow IPv6 multicast destination addresses to be carried in Ethernet unicast frames, without invalidating the original multicast-to-multicast mapping.
An IPv6 node receiving an IPv6 packet with a multicast destination address and an Ethernet link-layer unicast address MUST NOT drop the packet as a result of the use of this form of address mapping.
An IPv6 packet with a multicast destination address may be mapped to an Ethernet link-layer unicast address (rather than a multicast link-layer address) when it is clear that only one address is relevant. This extends the mapping defined in RFC 2464 Section 7.
RFC 6085 does not introduce any new security vulnerabilities beyond those present in the existing IPv6-over-Ethernet address mapping scheme.