A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Layer 2 Virtual Private Networks Working Group of the IETF.
Title : ARP Mediation for IP Interworking of Layer 2 VPN
Author(s) : H. Shah, et al.
Filename : draft-ietf-l2vpn-arp-mediation-05.txt
Pages : 20
Date : 2006-6-7
The VPWS service [L2VPN-FRM] provides point-to-point connections
between pairs of Customer Edge (CE) devices. It does so by binding
two Attachment Circuits (each connecting a CE device with a Provider
Edge, PE, device) to a pseudo-wire (connecting the two PEs). In
general, the Attachment Circuits must be of the same technology
(e.g., both Ethernet, both ATM), and the pseudo-wire must carry the
frames of that technology. However, if it is known that the frames'
payload consists solely of IP datagrams, it is possible to provide a
point-to-point connection in which the pseudo-wire connects
Attachment Circuits of different technologies. This requires the PEs
to perform a function known as "ARP Mediation". ARP Mediation refers
to the process of resolving Layer 2 addresses when different
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. In particular, the applicability of ARP mediation to
ISIS is not addressed as IS-IS PDUs are not sent over IP.
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