NVGRE
NVGRE is defined as a network virtualization technique that makes use of encapsulation and tunneling to provide a large number of VLANs. NVGRE provides subnets with VLANs that provide multi-tenant and load-balanced networks to be shared on the cloud environments. NVGRE solves the problem that is caused by to limited number of VLANs. It is difficult for complex virtualized environments to work with a limited number of VLANs. NVGRE makes sure that virtual local area networks can be expanded across various distributed data centers.
NVRGE Packet Format
NVRGE Packet Format
NVGRE makes use of the lower 24 bits of the GRE header. These bits can then support 16 million virtual networks like VxLAN. The need to use GRE header increases to provide aflow-level granularity that describes the utilization of bandwidth. The limitation of NVGRE is that it is not compatible with traditional load balancing.
VxLAN vs NVGRE: What’s the Difference?
Network Virtualization is defined as a process where overall monitoring and administration of the network is done as a single administrative entity by a software-based administrator. Network virtualization provides various features such as scalability, reliability, security, flexibility, and improved data transfer rates. Network virtualization also consists of storage virtualization that manages all the storage as an individual resource. All the services provided by the network and network servers are considered as a single pool of resources. The advantages of network virtualization are rapid scalability, dynamic network control, and lower hardware costs.