I reviewed this document as part of the Security Directorate's ongoing effort to review all IETF documents being processed by the IESG. These comments were written primarily for the benefit of the Security Area Directors. Document authors, document editors, and WG chairs should treat these comments just like any other IETF Last Call comments. Document: draft-ietf-bess-evpn-proxy-arp-nd-09 Reviewer: Russ Housley Review Date: 2020-12-08 IETF LC End Date: 2020-12-15 IESG Telechat date: unknown Summary: Has Issues Major Concerns: I worry about the reference to SEND (RFC 3971). The SEND protocol only supports digital signatures using RSA with SHA-1. While this still might be adequate for the time scales associated with ND, the 80-bit security offered by SHA-1 is not considered adequate for digital signatures in general. Is the reference to SEND really needed in this document? Minor Concerns: None Nits: The Gen-ART review by me includes some editorial suggestions.