During a recent customer discussion on NSX, I was asked about Virtual Machine sprawl in an NSX environment. This was a great question and cuts to the heart of Network Virtualization and how network functions are implemented in a virtualized environment…
One question that I get asked often is how NSX firewall state is maintained if you have a hypervisor based distributed firewall? The big difference in a distributed firewall vs a perimeter based firewall is that firewall execution has been moved from the perimeter of the network to the vNIC of the Virtual Machine…
I would like to review what a data center network would look like before and after network virtualization and the benefits gained.
The network topology shown here is very common between customers, although physically, size and scale of the number of switches, routers, and firewalls can be very different…
A customer question came up asking about what changes need to be made to the physical network when logical networks are created….
The telecom industry developed a specification for Network Functions Virtualization (NFV), although the specification and its application is just as relevant to enterprise customers.
The attached link is a PDF which describes the NFV Specification and use cases applicable to the telecom industry, and how telco’s have embraced SDN and the migration of Network Functions to virtualized workloads…
http://www.etsi.org/deliver/etsi_gs/NFV/001_099/001/01.01.01_60/gs_NFV001v010101p.pdf
SDN/NFV – An exciting world for telco IT and for enterprise IT 😉