Reservation of EVPN Route Types for Experimental Use

Introduction Ethernet VPN (EVPN) uses BGP for the distribution of reachability and membership information. EVPN network layer reachability information (NLRI) is carried in BGP using the EVPN SAFI (70) and includes a one-octet Route Type field that identifies the type of EVPN route (e.g., Ethernet Auto-Discovery, MAC/IP Advertisement, Inclusive Multicast Ethernet Tag, etc.). The EVPN Route Type registry is maintained by IANA and was created by . New EVPN route types are assigned through the "RFC Required" registration procedure. There is currently no reserved range in the EVPN Route Type registry for experimental use. Implementors and deployers who wish to experiment with new route types, without requesting an IANA assignment, have no designated codepoint space and risk conflicting with assignments via other specifications being developed in parallel. This document reserves codepoint space in the EVPN Route Type registry for experimental use. This approach aligns this registry with the practice of providing a clear, bounded space for experimental use to avoid conflicts and to discourage the practice of taking up codepoints without formal allocations in early development phases of implementations. This document updates as it modifies the registration policy for the EVPN Route Type registry by carving out space for experimental use.

IANA Considerations IANA is requested to modify the registration policy of the "EVPN Route Types" registry in the "Ethernet VPN (EVPN)" registry group by carving out the range of values 224 to 255 for Experimental Use . The registration policy for the rest of the space from 0 to 223 remains RFC Required as defined in . IANA is requested to add this document as a reference for this registry along with . As specified in , IANA is not required to maintain any record of allocations in the experimental codepoint space. describes the entry in the registry for the experimental range. EVPN Route Type Registry Ranges

Value	Description	Reference
224-255	Experimental Use (not assigned by IANA)	This document

Security Considerations Reserving a range of EVPN Route Types for experimental use does not introduce new security issues beyond those already present in EVPN . Implementations that process EVPN NLRI with route types in the reserved range (224-255) should apply the same validation and policy controls as for other route types. Deployments using experimental route types should ensure that only trusted peers exchange such NLRI, and that the semantics of the route type are agreed upon within the deployment to avoid misinterpretation.