IPvLX (IP with virtual Link eXtension) was the name for the first BoF on hybrid routing bridges (rbridges) at IETF60.

IPvLX is now a next-generation Internet proposal.
Links:
Internet Engineering Task Force (IETF)
Rbridge Mailing List
IETF - Routing and Addressing (RAM) List
IRTF - Routing Research Group (RRG)
ISATAP
IPvLX and related proposals:
The IPvLX proposal
ISATAP (RFC5214)
MANET Autoconfiguration using Virtual Ethernet (VET)
The Subnetwork Encapsulation and Adaptation Layer (SEAL)
***NEW*** Linux Source Code for VET