"This speed increase is critical to meet the demand from staff and students for research, teaching and learning, and administration," Mr Harte said.
It would also allow the delivery new "advanced" services which would likely be required during the lifetime of the new network.
The wireless upgrade would provide staff and students "ubiquitous wireless... irrespective of location within the boundaries of each university campus".
He said it would likely be a "couple of years" before a decision was made on whether to go ahead with the plan to provide free wireless to students and and staff in North Dunedin.
The final decision would in part depend on how successful the Government's rollout of ultra-fast broadband was.
Mr Harte said the university's network was eighth largest information and communications technology network in New Zealand.
"The university network is a fundamental and vital infrastructure which includes connections to and within the Dunedin, Christchurch, Wellington and Invercargill campuses plus the Auckland Centre and Wellington city office," he said.