This draft makes 3 points: - we shouldn't hard-code a policy of layer isolation as we think about OAM for NVO3 and other encapsulations - NVO3 encaps might consider enabling the ttl behavior which enables this form of traceroute - this is easy for VXLAN encapsulation - needs a bit in the VXLAN header
Comments are welcome. Erik -------- Forwarded Message -------- Subject: New Version Notification for draft-nordmark-nvo3-transcending-traceroute-00.txt Date: Wed, 04 Mar 2015 18:48:12 -0800 From: [email protected] To: Chandra Appanna <[email protected]>, Erik Nordmark <[email protected]>, Alton Lo <[email protected]>, Alton Lo <[email protected]>, Erik Nordmark <[email protected]>, Chandra Appanna <[email protected]> A new version of I-D, draft-nordmark-nvo3-transcending-traceroute-00.txt has been successfully submitted by Erik Nordmark and posted to the IETF repository. Name: draft-nordmark-nvo3-transcending-traceroute Revision: 00 Title: Layer-Transcending Traceroute for Overlay Networks like VXLAN Document date: 2015-03-02 Group: Individual Submission Pages: 18 URL: http://www.ietf.org/internet-drafts/draft-nordmark-nvo3-transcending-traceroute-00.txt Status: https://datatracker.ietf.org/doc/draft-nordmark-nvo3-transcending-traceroute/ Htmlized: http://tools.ietf.org/html/draft-nordmark-nvo3-transcending-traceroute-00 Abstract: Tools like traceroute have been very valuable for the operation of the Internet. Part of that value comes from being able to display information about routers and paths over which the user of the tool has no control, but the traceroute output can be passed along to someone else that can further investigate or fix the problem. In overlay networks such as VXLAN and NVGRE the prevailing view is that since the overlay network has no control of the underlay there needs to be special tools and agreements to enable extracting traces from the underlay. We argue that enabling visibility into the underlay and using existing tools like traceroute has been overlooked and would add value in many deployments of overlay networks. This document specifies an approach that can be used to make traceroute transcend layers of encapsulation including details for how to apply this to VXLAN. The technique can be applied to other encapsulations used for overlay networks. It can also be implemented using current commercial silicon.
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