VNEXT: Virtual network management for Xen-based Testbeds. - Pedro Silveira Pisa; Rodrigo S. Couto 001; Hugo E. T. Carvalho; Daniel J. S. Neto; Natalia Castro Fernandes; Miguel Elias M. Campista; Luís Henrique Maciel Kosmalski Costa; Otto Carlos M. B. Duarte; Guy Pujolle (NOF, 2011)