But the challenge is at the Network Edge…
Worse still, there are limits on the deployment of such solutions, such as the 4096 VLAN limit, that can severely restrict the availability and deployment velocity of such services. With the arrival of virtualization and cloud-based services, these limitations have become a major headache for most network and data center providers.
Applications using legacy tunnelling protocols can be identified and processed by the OpenFlow switch at ingress and egress points, automatically substituting OpenFlow based tunnelling mechanisms not subject to those same limitations on legacy mechanisms. This makes it possible for multi-domain networks to support almost any number of tunnels crossing from domain to domain, significantly simplifying the provisioning of services that cross domains. It also makes possible the complete segregation of data paths in multi-tenant and multi-home environments, the establishment of multi-domain services that can span the globe and offer a unified user experience to customers or employees no matter where they are or how they are connected.
High capacity OpenFlow switches such as the NoviSwitch 2128 can support up to one million flow entries in a single 1U switch, making it both possible and economical to deploy highly granular services that require the use of multiple tunnels, possibly down to each and every client.
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