Preventing Suboptimal Routes by Setting the Administrative Distance
One simple and elegant solution to the problem of suboptimal routes on redistributing routers isto flag the redistributed routes with a higher AD. A route’s AD is not advertised by the routingprotocol; however, a single router can be configured such that it assigns different AD values todifferent routes, which then impacts that one router’s choice of which routes end up in that router’srouting table. For example, back in Figure 11-4 and Example 11-3, R3 could have assig..
Infrastructure Mode Configuration
An infrastructure wireless LAN (sometimes referred to as infrastructure mode) is what most companies, public hotspots, and home users implement. An infrastructure wireless LAN, as depicted in Figure 22-1, offers a means to extend a wired network. In this configuration, one or more access points interface wireless mobile devices to the distribution system. Each access point forms a radio cell, also called a basic service set (BSS), which enables wireless users located within t..
As briefly introduced earlier, there are two models for providing the differentiated levels of network service required in converged networks: IntServ and DiffServ. IntServ Overview Think of best-effort IP service in terms of the regular mail (snail-mail) service. The mail is delivered if and when it can be, but it also might be lost (arriving at some undetermined time in the future or not at all). By comparison, IntServ is analogous to a custom mail service, such as diplom..
FCAPS (fault, configuration, accounting, performance and security), the ISO model for network management, is a functional approach that segments management areas into discrete categories, which allows the network manager or management framework to address each in turn and ensure that no area is overlooked. FCAPS is a model, not a product. Many network management applications and designs adopt FCAPS, and internally developed procedures and tools can also be architected along t..
When EIGRP neighbors first become neighbors, they begin exchanging topology information using Update messages using these rules: ■ When a neighbor first comes up, the routers exchange full updates, meaning the routers exchange all topology information. ■ After all prefixes have been exchanged with a neighbor, the updates cease with that neighbor if no changes occur in the network. There is no periodic reflooding of topology data. ■ If something changes–for example, on..
