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Technical Issues

Technical Issues. Dark fibre is becoming more ubiquitous Still need to find out if/where it exists in some places. Investigate use of dark fibre in possession of NREN by other NRENs. Investigate transmission equipment (L1)

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Technical Issues

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  1. Technical Issues • Dark fibre is becoming more ubiquitous • Still need to find out if/where it exists in some places. • Investigate use of dark fibre in possession of NREN by other NRENs. • Investigate transmission equipment (L1) • How to drive down costs (integrating ports, regeneration or amplification etc..)? • Which transmission protocol to use (SDH, GE or 10GBase)? • Moving to fewer devices in core? • Have one-to-one discussions with industry vendors. • Agreed that multi-domain, multi-vendor hybrid networks are the future. • How to achieve inter(-optical) domain model? • Problems with ‘not-quite-compatible’ standards. Work with vendors and standard bodies on interoperability issues (e.g. in control plane) • Management and policy issues to resolve. EARNEST Workshop, 24 May 2006

  2. Technical Issues • Bandwidth allocation • Stick with IP that is best effort and solve problem with overprovisioning and/or separate networks for demanding users? • Develop bandwidth reservation techniques (at control plane and/or middleware levels)? • Will the sharing of network capacity only become feasible when bandwidth becomes so cheap and abundant that no-one cares about it? • Testbed networks • The ability to undertake disruptive testing is required. • Potentially need to test new lower-layer protocols. • Need to be neutral, long-distance and multi-vendor. EARNEST Workshop, 24 May 2006

  3. Technical Issues • Network management • Use of IPv4, IPv6 or something new (GENI?) • Should everyone have a public IP address? • Firewalls and NATs complicate management and force protocols to be used for unsuitable tasks. • How to manage multiple VLANs? • Concerns about increasing network management complexity with separate optical, IP (and other?) layers to manage. • Wider issues • Investigate scaling of large AAI federations. • Focus so much on Grid requirements? • Work more closely with vendors as to community requirements. • General trend to support more, but smaller users (e.g. schools). EARNEST Workshop, 24 May 2006

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