The IESG has approved the following document: - 'ARP Mediation for IP Interworking of Layer 2 VPN' (draft-ietf-l2vpn-arp-mediation-19.txt) as a Proposed Standard This document is the product of the Layer 2 Virtual Private Networks Working Group. The IESG contact persons are Stewart Bryant and Adrian Farrel. A URL of this Internet Draft is: http://datatracker.ietf.org/doc/draft-ietf-l2vpn-arp-mediation/ Technical Summary A Virtual Private Wire Service (VPWS) provides a point-to-point connection service between a pair of Customer Edge (CE) devices over an IP/MPLS packet switched network using Pseudowire Emulation Edge to Edge (PWE3) technology. It does so by binding two Attachment Circuits (ACs), each connecting a CE device with a Provider Edge (PE) device, to a Pseudowire (PW) extended between the two PEs. PWE3 defines PW types that interconnect ACs of the same technology (homogeneous ACs), e.g., both ACs being Ethernet. In general, a VPWS provides connectivity between homogeneous ACs using the existing PWE3 technology. However, if the ACs are layer2 attachment circuits of heterogeneous types (e.g., one AC is Ethernet and the other one is a Fame Relay DLCI), and solely carry IP datagrams in the corresponding packet data units' payload, it is possible to provide a VPWS that interconnects these ACs using IP Layer2 Transport PWs often referred to simply as IP PWs. This requires the PEs to perform a function known as "ARP Mediation". ARP Mediation refers to the process of resolving IP addresses to Layer 2 addresses when different address resolution protocols are used on either Attachment Circuit. The methods described in this document are applicable even when the CEs run a routing protocol between them as long as the routing protocol runs over IP. Working Group Summary This document has been in existence since the very beginning of the PPVPN and L2VPN WG's. At first, it only included support for IPv4, but subsequently was updated to include support for IPv6. Ultimately, this document provides a means of interworking IPv4-enabled ACs, IPv6-enabled ACs and dual-stack IPv4/IPv6-enabled ACs whereby the ACs are of disparate Layer2 technologies. Document Quality There are no concerns about document quality. Several implementations of this draft have existed in the field for several years. Personnel Nabil Bitar (nabil.n.bitar@verizon.com) is the Document Shepherd. Stewart Bryant (stbryant@cisco.com) is the Responsible Area Director. RFC Editor Note In section 2 OLD A PE that is to perform ARP Mediation for IPv6 packets SHOULD perform the following logical steps: NEW A PE that is to perform ARP Mediation for IPv6 packets MUST perform the following logical steps: END ===== In section 4.3.3 - two places - end of list item 2 - end of first sentence list item 3 In section 4.3.4 second para OLD link-layer address of the local AC NEW link layer address of the PE interface attached to local AC END _______________________________________________ IETF-Announce mailing list IETF-Announce@ietf.org https://www.ietf.org/mailman/listinfo/ietf-announce
