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cisco ccna jobs in south africa.can use this information and the DLCI number provided to travel to the annunciator. Reverse ARP resolves the known local DLCI to a Layer 3address, such as an IP address. VC Status You already know one of the three states of the VC: active. Table 25.4 lists all three basic VC states. A VC is active only when it isis active, reverse ARPO is performed on itKeep the VC states listed in Table 25.4 in mind for exam points.Table 25.4 VC State State DescriptionsActive VC between two Frame Relay DTEs is established and operating normallyInactive The VC between the current Frame Relay DTE and the DCE is established and operating normally, but there is a problem with your connection to the Frame Relay switch and the target DTEDeleted No LMI messages are received from the Frame Relay switch about the local VCDisadvantages of Dynamic ParsingWhile dynamic parsing does not require any configuration at the router to function, it does have some drawbacks. First, one of the main problems with dynamic resolution is that in order to send data through the VC, you must wait until the state of the VC is known and reverse ARP has been executed. Even if the data link layer is functioning properly and the VC is established, this process takes more than 60 seconds. The advantage of manually resolving the PVC is that the router can begin sending traffic to the target router as soon as the data link layer is functioning properly; if the Frame Relay switch responds when the router sends the first LMI query, the router can begin transmitting information to the target DTE in less than one second. Thus, although manual resolution requires that all resolution entries be manually configured, many network administrators choose to do so so that data transmission over the VC can begin once both the physical and data link layers are in the up state (the interface state is "upandlineprotocolisup").