I-D ACTION:draft-ietf-l2vpn-arp-mediation-19.txt
Internet-Drafts@ietf.org Fri, 13 January 2012 01:15 UTC
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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-19.txt
Pages : 33
Date : 2012-01-12
The Virtual Private Wire Service (VPWS) [RFC4664] 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
pseudowire (connecting the two PEs). In general, the Attachment
Circuits must be of the same technology (e.g., both Ethernet,
both ATM), and the pseudowire 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 pseudowire 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.
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