@techreport{saum-nvo3-mtu-propagation-over-evpn-overlays-06, number = {draft-saum-nvo3-mtu-propagation-over-evpn-overlays-06}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-saum-nvo3-mtu-propagation-over-evpn-overlays/06/}, author = {Saumya Dikshit and Vinayak Joshi and A Sujeet Nayak}, title = {{MTU propagation over EVPN Overlays}}, pagetotal = 32, year = 2024, month = jul, day = 31, abstract = {Path MTU Discovery between end-host-devices/Virtual-Machines/servers/ workloads connected over an EVPN-Overlay Network in Datacenter/Campus/enterprise deployment, is a problem, yet to be resolved in the standards forums. It needs a converged solution to ensure optimal usage of network and computational resources of the networking elements, including underlay routers/switches, constituting the overlay network. This documents takes leads from the guidelines presented in {[}RFC4459{]}. The overlay connectivity can pan across various sites (geographically seperated or collocated) for realizing a Datacenter Interconnect or intersite VPNs between campus sites (buildings, branch offices etc). This literature intends to solve problem of icmp error propagation from an underlay routing/switching device to an end-host (hooked to EVPN overlay), thus facilitating "accurate MTU" learnings. This document also leverages the icmp multipart message extension, mentioned in {[}RFC4884{]} to carry the original packet in the icmp PDU.}, }