Introduction
Over the past several years, switching has evolved from simple Layer 3 switches to switches supporting Layer 4 through Layer 7 features such as server load balancing, URL inspection, firewall, virtual private network (VPN), access-based control, and so on with large port densities. The multilayer switch has become an “all-in-one” component of the network infrastructure. As a result of this evolution, enterprise and service providers are deploying multilayer switches in place of multiple network components such as routers and network appliances. Switching is no longer a part of the network infrastructure; it is now the network infrastructure.
As enterprises, service providers, and even consumers deploy multilayer switching, the need ...
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