Cloud-Managed Networks–Cisco Managing Networks
Many network equipment vendors, including Cisco, are now shipping and supporting cloud-managed networks. This trend started with large-scale Wi-Fi networks but is spreading to campuses, data centers, and wide area networks. Figure 21-11 illustrates a cloud-managed network’s basic components and …
Review All the Key Topics–Cisco Managing Networks
Review All the Key Topics Table 21-3 lists the key topics for this chapter. Table 21-3 Key Topics for Chapter 21 Concepts and Actions Review the concepts considered in this chapter using Table 21- 4. You can cover the right …
Failure Terminology–Cisco Troubleshooting
While it is often tempting to start putting a new piece of flat-pack furniture together without bothering to read the long instruction sheet, it is almost always a better idea to understand how the parts are labeled and how they …
Fragility and Resilience–Cisco Troubleshooting
Fragility and resilience can be described in two statements: • Fragile systems fail easily in the face of environmental pressure. • Resilient systems survive environmental pressure. Environmental pressure might be a link failure, software failure, hardware failure, or even human …
The Half-Split Method–Cisco Troubleshooting
When faced with a problem, most engineers will start with the following: • The most recent change • Where most failures have happened in the past • What the engineer is most familiar with Starting with the most recent change …
The Post-Mortem–Cisco Troubleshooting
Post-mortems are a time set aside to go over a network failure, the troubleshooting process, and the solution. Post-mortems should be loosely structured and answer just a few questions, including • What is the root cause? Why are we sure …
Managing Change–Cisco Managing Networks
Change management is the set of formal and informal processes used to manage changes to a network over time. Change management plans have many components, including • Testing processes that must be followed before network changes can be implemented. • …
Technical Debt–Cisco Managing Networks
One term you are bound to hear a lot if you work around engineers is technical debt. Most engineers think of technical debt as some combination of the following: • Anything old hardware, software, or system • Anything the original …
Connecting to Manage–Cisco Managing Networks
Chapter 10 covered two kinds of common management ports: console ports and management Ethernet ports. You can use these ports to connect to a router in several ways—either using in-band or out-of-band management. In-Band and Out-of-Band Management In-band management means …
Management Systems–Cisco Managing Networks
At some scale or level of complexity, all operators move from manually monitoring and managing their networks to using some form of network management system (NMS). Figure 21-9 illustrates the basic components of an NMS. Figure 21-9 Management System Components …