Configuring Routing–Cisco Configuring a Network
Whenever there is a reachability problem, the best place to start looking for the problem is the routing table, which you can see by using show ip route. Figure 23-8 illustrates the parts of show ip route’s output. Figure 23-8 …
Advice to Troubleshooters–Cisco Troubleshooting
Troubleshooting is a difficult skill. It is easy to become tangled up in trivia or chase the wrong set of symptoms, and it takes far longer to find and fix a problem than it might seem it should. This section …
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 …
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 …
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 …