This is nice! Thanks for the pointers!
I have to dig more into these, but one quick question: Is the alternate path pre-calculate and pre-installed, or is it recalculated installed on the fly to switches when link fails? Thanks, Joon From: Small, Christopher [mailto:chsm...@indiana.edu] Sent: Tuesday, May 22, 2012 2:37 PM To: Kim, Hyojoon Cc: openflow-discuss@lists.stanford.edu Subject: Re: [openflow-discuss] Failure detection and recovery with OpenFlow One piece of software that detects and recovers from failures is the OESS software, developed by Indiana University and deployed on Internet2 NDDI. This software uses the NoX LLSP discovery but also the OpenFlow Port Status Async messages to detect failures. OESS can be configured to switch to alternate path if a link failure is detected. Failovers within a second even with the latencies on a national footprint. NDDI http://www.internet2.edu/network/ose/ OESS Code http://code.google.com/p/nddi/ Chris Small InCNTRE Indiana University chsm...@indiana.edu On May 22, 2012, at 5:18 PM, Kim, Hyojoon wrote: Hi all, I am curious whether there is a good solution for data-plane link failure detection and recovery in OpenFlow (or any SDN-based solution). I am aware of NOX or Floodlight's LLDP-based topology discovery modules, which can detect link failures. However, I am looking for an OpenFlow solution that can not only detect, bus also recover from the failure (e.g., by rerouting or finding alternate paths) automatically. The closest I can find is PortLand's fault tolerant routing feature, published in SIGCOMM 2009, which uses a "fabric manager" (an OpenFlow controller) to do the recovery. Is anyone aware of some other related work or solutions? Thanks, Joon _______________________________________________ openflow-discuss mailing list openflow-discuss@lists.stanford.edu https://mailman.stanford.edu/mailman/listinfo/openflow-discuss
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