[number 5 in a series of unscientific surveys] If you currently multi-home between two or more providers using IPv4: + why do you do it? What are the high-level goals you are hoping to achieve? Are you finding that you are achieving them? + how often does your traffic shift between transit providers due to a failure of some kind triggering a re-homing? + how often do you manually shift traffic, and why? Just inbound traffic? Or outbound too? + what impact does a manual or automatic shift in traffic between providers have to your users? Do their TCP sessions break? Or do you think they normally stay alive, maybe after a delay? What makes you think this? + what is *bad* about the way that multi-homing works in IPv4? + what is good about it? Context is an attempt to nail down some requirements for a multi-homing architecture in IPv6 (one that doesn't incorporate exciting up-and-to-the- right state explosion in the DFZ). I can summarise private replies if there is interest. http://www.ietf.org/html.charters/multi6-charter.html http://www.automagic.org/~jabley/draft-ietf-multi6-multihoming-requirements-... http://www.automagic.org/~jabley/draft-ietf-multi6-v4-multihoming-00.txt Joe