MPLS is a key element in Cisco's overall strategy for providing scalable Internet solutions. MPLS combines the performance and virtual-circuit capabilities of Layer 2 switching with the proven scalability of Layer 3 networking and is the first technology to fully integrate routing and switching for a scalable IP environment. Highlights RPM runs Cisco's IOS operating system. The RPM supports all the routing protocols that are used today in the enterprise and service provider environments. One way that network elements handle an overflow of arriving traffic is to use a queueing algorithm to sort the traffic, then determine some method of prioritizing it onto an output link.
Labels indicate both route and service attributes.
MPLS-VPN is a technique for delivering IP VPNs. The Route Processor module as mentioned above has an ATM deluxe port adaptor interface to the chassis backplane. Supporting all these service classes allows the ATM PA to concurrently support various network applications on the same ATM interface. ABR was defined specifically to minimize cell loss and maximize goodput through the ATM network. Explicit Rate mode is typically deployed in ATM WAN networks, and Relative Rate mode is more effectively deployed in the campus.