Hi Stephen et al., In general we do not require inbound connectivity. The typical pattern is connecting and driving the demo via a web service located elsewhere. I would like that the connection for demo (~20) could be copper instead of wifi to protect them from network instabilities. Since anyway a "cable" has to pulled to the exhibition room, this should not add to the complexity (and cost) in any significant way. I agree on the assumption of IPv4 only. What is the uplink capacity you are negotiating? With my best regards, Massimo -----Original Message----- From: Kristina Ulrika Gunne Sent: Thursday, February 08, 2007 14:31 To: Stephen.Pickles@manchester.ac.uk; ogf20pc@ogf.org; Steven Newhouse Cc: Massimo Lamanna; Erwin Laure Subject: RE: Network question Importance: High Hi Stephen, I forward this request to the more technical people who I hope can answer your questions. Best regards, Kristina -----Original Message----- From: Stephen M Pickles [mailto:Stephen.Pickles@manchester.ac.uk] Sent: 08 February 2007 14:29 To: ogf20pc@ogf.org; Kristina Ulrika Gunne; Steven Newhouse Subject: Network question All, A question has arisen regarding the network provision at OGF20 and EGEE-UF 2. Is anyone likely to be running a demonstration in the exhibition that will involve incoming connections? We need to be able to provide up to 900 or so IP addresses. If all connections will be outgoing, it should be possible to do this using Network Address Translation. If some connections will be incoming, then it is likely that real IP addresses will be needed. An early response will be very helpful. Obtaining 900+ real IP addresses will require some negotiation and cannot be guaranteed at this stage. Adopting a hybrid solution of NAT for wireless and real IP addresses for wired ethernet to the booths is possible, but would add complexity to the network design and configuration. Stephen PS We're assuming IPV6 will not be required. ==================== Stephen M. Pickles ==================== Technical Director, National Grid Service Manchester Computing Room G49.1, Kilburn Building The University of Manchester tel: +44 161 275 5974 Oxford Road fax: +44 161 275 6800 Manchester M13 9PL stephen.pickles@manchester.ac.uk