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IBM b-type Data Center Networking: Design and Best Practices Introduction by Steven Tong, Sebastian Oglaza, Michal Holenia, Norman Bogard, Jon Tate

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Making the network highly available
In this chapter we provide an overview of the high availability features available in the IBM b-type Ethernet product range. We cover the following features:
Hardware resiliency
Layer 1 availability features
Layer 2 availability features
Layer 3 availability features
Protected link groups
Link aggregation groups
PoE priority
Hitless upgrades
4.1 Hardware resiliency
As mentioned in Chapter 3, “Networking introduction” on page 199, historically, networks were considered unreliable. Because of these unreliability ...

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