Tag switching (3)
Control component
- based on the notion of binding between tag and network-layer routing
- control component is responsible for creating tag bindings and then distributing the tag-binding information among tag switches
- collection of modules; each designed to support a particular routing function
Modules to support routing functions
- in destination based routing, a router makes a forwarding decisions based on the destination address carried in a packed and stored in the Forwarding Infrastructure Base (FIB) maintained by a router. There are 3 methods: downstream allocation, upstream allocation, downstream tag allocation on demand