Introduction to Virtual Wide Area Networks

VWANs perform a similar function for wide area networks that VLANs perform for local area networks; Where VLANs are designed to efficiently shape LAN architecture so that it behaves as if it were multiple networks, VWANs shape WAN architectures so that multiple WANs behave like a single network. Both VLANs and VWANs operate at Layer 2 (Link) of the OSI model and VWANs are transparent to VLAN traffic.













VWAN Bonding

VWAN Bonding describes the ability of VWANs to deliver increased wide area bandwidth and lower latency between remote systems by combining the bandwidth of multiple wide area networks and providing it to all applications. To increase efficiency and performance VWANs are not stream-based or constrained by packet-for-packet splitting over the available WANs but allow all application traffic to be addressed to all WAN links based on link performance and applications priority.


WAN Aggregation


VWAN Bonding is especially important for bandwidth-intensive and latency sensitive applications such as video conferencing or surveillance and VoIP in wired and wireless environments. WAN Bonding is also used to significantly reduce the cost of wide area networking by allowing multiple, lower cost and lower bandwidth links to replace expensive managed services without loss of availability or performance.


VWAN Roaming

VWAN Roaming describes the ability of VWANs to maintain a wide area connection between remote systems that can be transferred from one wide area network to another without loss of data and with minimal disruption to reliant applications and services.


WAN Mobility


For VWAN Roaming to be executed effectively the VWAN maintains data session continuity and manages the effective hand over between wide area networks. VWAN Roaming supports the seamless of handoff of any type of data session between WANs but is especially important when real-time applications such as VoIP and video are used in wired and wireless environment.


WAN Persistence

By combining VWAN Bonding and VWAN Roaming functions a significantly increase in the up-time for wide area networking can be achieved. WAN Persistence allows VWANs to manage complete out-of-coverage situations by simulating a congested network to the applications that rely upon the wide area when there is no end-to-end connection available. This technique gives applications every possible opportunity to recover when connectivity is restored whilst allowing state to be maintained.


WAN Resilience



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