To be frank, with the limitations imposed around your physical access (no colo in a datacenter or use of "cloud") you are really not going to achieve much useful by complex PI routing of any sort. I would highly recommend you find a good business class ISP that can tailor a BGP failover solution (Fibre/VDSL?) to suit your physical assess limitations. This will be the most reliable and effective solution. If your boss wants full PI, then colo in a datacenter with real diversity and get an APNIC block. Don’t try and do a half pie hybrid that will make your service less reliable. -----Original Message----- From: Matthew Poole Sent: Friday, November 08, 2013 9:11 AM To: Dobbins, Roland Cc: NZNOG Subject: Re: [nznog] Multi-homing without PI space There's a degree of fibre path convergence due to our premises location (only one practical approach, without spending six figures to trench through a very, very long parking lot or trying to get easement under the Parnell rail switching yards), but it will be separate conduits going to separate provider end-points.