By Jean-Philippe Vasseur M.S. in Computer Science, Mario Pickavet, Piet Demeester
ISBN-10: 1417537175
ISBN-13: 9781417537174
Network Recovery is the 1st ebook to supply distinctive info on holding and restoring verbal exchange networks, and it units a sky-high average for any which may stick with. inside of, you’ll examine particular innovations that paintings at each one layer of the networking hierarchy―including optical, SONET-SDH, IP, and MPLS―as good as multi-layer escalation innovations that supply the top point of safeguard. The authors start with an incisive advent to the problems that outline the sphere of community safety and recovery, and because the e-book progresses they clarify every thing you must find out about the suitable protocols, supplying theoretical analyses anywhere acceptable. if you happen to paintings for a network-dependent association, huge or small, you’ll are looking to continue community restoration nearby continuously.
* indicates you the way to enforce safeguard and restoration recommendations that may shop your company time and money.
* records ideas for the optical, SONET-SDH, IP, and MPLS layers, in addition to multi-layer escalation strategies.
* exhibits you ways to guage those ideas with regards to each other, so that you can increase an optimum community restoration design.
* presents examples and simulation results.
* Delves into the internal workings of correct protocols and provides theoretical analyses anyplace this knowledge contributes on your sensible wisdom.
Read Online or Download Network recovery : protection and restoration of optical, SONET-SDH, IP and MPLS PDF
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Extra resources for Network recovery : protection and restoration of optical, SONET-SDH, IP and MPLS
Sample text
Percentage of Coverage The recovery mechanism may completely or partially cover the failure scenario. , if a certain percentage of the traffic is high priority). Another example is the percentage of coverage of node failures. 16 Incomplete coverage of a node failure. node is a transit node) or not (in the case of an edge node). Traffic coming from or terminated in the failing node cannot be recovered (at least not by a recovery mechanism operating in this network layer only; see Chapter 6 for a more thorough discussion of this topic).
Note: This does not imply that after the recovery time, the traffic will experience the same network conditions as before the failure occurred. For instance, the recovery path could have more limited resources or a worse signal quality than the working path. 3 Backup Capacity Requirements When comparing different recovery schemes, the backup capacity that is needed to recover from the same failure scenarios may be quite different. The capacity requirements of the recovery scheme may depend on variables such as the algorithm selecting the recovery paths, the traffic characteristics, or the layer in which the recovery mechanism operates.
Quick detection of failures or dangerous situations, by a smoke detection system, an automatic sprinkler system, or a direct connection with the fire department, can increase the availability as well. Another strategy is to duplicate vulnerable network elements. For instance, in the case of a cross-connect failure, all traffic can be switched to an identical hot standby cross-connect (most helpful in hardware failures). Also the network access link can be duplicated to ensure that users are not cut off from the network by a single failure.
Network recovery : protection and restoration of optical, SONET-SDH, IP and MPLS by Jean-Philippe Vasseur M.S. in Computer Science, Mario Pickavet, Piet Demeester
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