Impact of the Decision Process and NEXT_HOP on BGP Updates

The next several examples together show a sequence of events regarding the propagation of network 31.0.0.0/8 by BGP throughout the network of Figure 12-4. R6 originated the routes in the 30s (as in Example 12-4) by redistributing EIGRP routes learned from R9. The purpose of this series of examples i...

Multipath

Multipath interference occurs when an RF signal takes different paths when propagating from one wireless station to another. While the signal is en route, walls, chairs, desks, and other items get in the way and cause the signal to bounce in different directions. A portion of the signal might go dir...

Configuring an Async Serial Interface

Cisco has a class of serial modules that can support either synchronous or asynchronous communications, as required. You can use the physical-layer async command to change the interface from the default synchronous to asynchronous mode: Router3#configure terminal Enter configuration commands, one...

Configuring the LMI Type on a Frame Relay Interface

Cisco supports three different Local Management Interface (LMI) types for Frame Relay: Cisco, ANSI Annex D, and Q933-A Annex A. Beginning with Cisco IOS Software Release 11.2, the LMI autosense feature allows a Frame Relay interface to autodetect the LMI type supported by the directly connected Fra...

Calculating Summary Routes

Note that the examples in this chapter generally use simpler examples of summary routes, using prefix lengths like /24 and /16 most often. However, for the exam, you need to be comfortable interpreting prefix/prefix length pairs, and subnet/mask pairs, whether they represent an actual subnet or a...

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