To aggregate (summarize) routes within the BGP domain, use the following command from router configuration mode: Router(config-router)#aggregate-address ip-address mask [summary-only] [as-set] If the parameter summary-only is used, then the specific routes are suppressed and the summary route is the only one propagated. Sending only the summary is the usual usage. If the parameter as-set is used, then all the autonomous systems that have been traversed will be recorde..
Snapshot routing is a time-triggered routing update facility that enables a remote "slave" router to learn dynamic routing and service information from a central "master" router during a short active period. This learned information is then stored for a user-configurable period of inactivity (T2) until the next active period. If no routing updates are exchanged during the active period (because a DDR phone number or interface is unavailable), a user-config..
This section briefly covers the IP multicast areas of interest for the CCIE written test. The multicasting protocol was designed to reduce the high bandwidth requirements of technologies, such as video on demand, to a single stream of information to more than one device. Applications include electronic learning, company share meetings (video on demand), and software distribution. Multicasting transmits IP packets from a single source to multiple destinations. The network dev..
Configuring Frame Relay Traffic Shaping
This section discusses the IOS configuration commands for configuring Frame Relay Traffic Shaping on a Cisco router. NOTE For this discussion, IOS Release 12.2(1) was used on all routers in the lab to maintain a consistency of software versions. The same release was used in the case study scenarios at the end of this chapter. Before configuring Frame Relay Traffic Shaping on a Cisco router, you must enable Frame Relay encapsulation on the main interface. By default, config..
v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} The standard Frame Relay header consists of two octets. Figure 1-4 illustrates the standard Frame Relay header. Figure 1-4. Standard Frame Relay Header The DLCI is a 10-bit address in the Frame Relay header, whose possible value ranges from 0 to 1023. The DLCI makes up the largest portion of the Frame Relay h..
