I'm try to redesign the Sudanese NREN (National Research & Education Network). we provide end to end service,to our customers. Our network is build over local ISPs. But the problem of the current design that each time we need to go back to the ISP to change our Infrastructure IP addresses, when the situation need this.How can solve this? I heard about something called Virtual Network Environment which give us the full control of ISP routers, is it the best solution? What about others NRENs.Thanks Normal0falsefalsefalseEN-USX-NONEAR-SAMicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} --------------------------------- Eng. Tarig Yassin Adam Sudanese Universities' Information Network (SUIN) T: +249925659149 E: tarig@sustech.edu