Network recovery : protection and restoration of optical, by Jean-Philippe Vasseur M.S. in Computer Science, Mario

By Jean-Philippe Vasseur M.S. in Computer Science, Mario Pickavet, Piet Demeester

Network Recovery is the 1st publication to supply specific details on conserving and restoring verbal exchange networks, and it units a sky-high commonplace for any which may stick with. within, you’ll research particular suggestions that paintings at every one layer of the networking hierarchy―including optical, SONET-SDH, IP, and MPLS―as good as multi-layer escalation ideas that provide the top point of security. The authors start with an incisive advent to the problems that outline the sector of community safeguard and recovery, and because the publication progresses they clarify every thing you want to learn about the suitable protocols, supplying theoretical analyses anyplace acceptable. when you paintings for a network-dependent association, huge or small, you’ll are looking to continue community restoration within sight perpetually.

* indicates you ways to enforce defense and restoration thoughts that would shop your company time and money.
* files strategies for the optical, SONET-SDH, IP, and MPLS layers, in addition to multi-layer escalation strategies.
* exhibits you the way to judge those thoughts with regards to each other, so that you can advance an optimum community restoration design.
* presents examples and simulation results.
* Delves into the interior workings of appropriate protocols and provides theoretical analyses anyplace this data contributes in your useful wisdom.

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Additional info for Network recovery : protection and restoration of optical, SONET-SDH, IP and MPLS

Sample text

The mean time between failures (MTBFs) specifies the average length of the time interval that elapses between two subsequent failures of the same network element. The mean time to repair (MTTR) refers to the average time needed to repair the network element when it has failed. From these two values, the availability of the network element can be derived as A¼1À MTTR MTBF (under the assumption that the MTBF is much larger than the MTTR, a safe assumption for most network elements). 2 General Introduction Which Failures Can Occur?

From the IP point of view, a number of secondary failures (links a-b, b-c and b-d) are noticed, isolating router b.

2, quite a large variety of failure types may occur in a telecommunications network. However, many services require high network availability. To bring these two opposing factors together, we take several measures. A first possibility is to prevent failures as much as possible. For instance, the likelihood of a cable cut can be reduced by putting the cable deeper in the ground or by using special armored cables, and the number of failures in exchange offices can be diminished by a fire security plan or by limited access to the building.

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