Previewing Data Center Components
The word infrastructure has been used several times in this book so far, most often in reference to the electrical and data cabling provided to Data Center cabinet locations. In truth, it is a broader term that traditionally applies to seven basic Data Center facility systems: physical space, raised flooring, in-room electrical, standby power, data cabling, cooling, and fire suppression. (The term can also apply to the collection of networking devices in a Data Center, but si..
Finding an Alternative Path to a Remote Network
When the path to a network is lost, EIGRP goes to a lot of trouble to find an alternative path. The method that EIGRP uses to find alternative paths is very reliable and very fast. The following list describes the process after a neighbor goes offline: 1. The router marks the routes that were reached by sending the traffic to that neighbor. 2. The router looks in the topology table, which has every advertisement received, to determine whether there is an alterna..
To successfully manage any network, timely and accurate information is required. Not only is current and up-to-date information necessary (that is, "snapshots" of the WLAN in its current state), but also historical reporting capabilities are required to help identify trends. Additionally, alerting capabilities are important. WLAN reporting includes three related areas, as described in the following sections: • Standard/systematic reports • &nb..
You can use the offset-list configuration command to modify the metrics of routes that EIGRP learns through a particular interface: Router1#configure terminal Enter configuration commands, one per line. End with CNTL/Z.Router1(config)#access-list 22 permit 192.168.30.0Router1(config)#router eigrp 55Router1(config-router)#offset-list 22 in 10000 Serial0.1Router1(config-router)#exitRouter1(config)#endRouter1# This command can also modify the EIGRP metrics of routes as the..
Using Policy-Based Routing to Route Based on Source Address
This configuration example defines a special routing policy for a group of users defined by the route map called "Engineers." This name is arbitrary, and we recommend that you choose names for your route maps that are meaningful in your organization. This example applies the route map to all of the packets received on the interface Ethernet0. This might be required because these users need to use a special higher capacity link, for example. There are two clauses in this rout..
