By Vivek Alwayn
I need to admit that i used to be really puzzled by way of this publication. MPLS isn't my most powerful sector of analysis - this publication didn't aid my development of data. this isn't a ebook to learn from cover-to-cover, yet most sensible learn because the specifications come up. i feel the writer was once quite biased in the direction of 'pro-Cisco'. i didn't see any point out of the functionality degradations which may accompany MPLS implementations. additionally, i believe the publication wanted a second grammatical editor, because the total 'flow' of the booklet was once nonevident. I supply this ebook three pings out of five: !!..!
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Extra info for Advanced MPLS Design and Implementation
A packet that enters the network at a particular router can be labeled differently than the same packet entering the network at a different router. As a result, forwarding decisions that depend on the ingress router can be made easily. This cannot be done with conventional forwarding, because the identity of a packet's ingress router does not travel with the packet. For example, packets arriving on different interfaces connected to CPE routers might be assigned to different FECs. The attached labels would represent the corresponding FECs.
In this case, the label represents the combination of a FEC and a precedence or class of service. This functionality forms the basis of MPLS Quality of Service (QoS). com/158705020X/ch03lev1sec1] Copyright © 2002 O'Reilly & Associates, Inc. All rights reserved. 1005 Gravenstein Highway North Sebastopol, CA 95472 Book: Advanced MPLS Design and Implementation Section: MPLS Architecture MPLS Node Architecture MPLS nodes have two architectural planes: the MPLS forwarding plane and the MPLS control plane.
When an ATM end system connects to an ATM network, it enters a contract with the network, based on QoS parameters. Traffic shaping is the use of queues to constrain data bursts, limit peak data rate, and smooth jitters so that traffic will fit within the promised envelope. ATM devices are responsible for adhering to the contract by means of traffic shaping. ATM switches can use traffic policing to enforce the contract. The switch can measure the actual traffic flow and compare it against the agreed-upon traffic envelope.