cisco ccna job opportunities

cisco ccna job opportunities.Router# debug frame-relay Imi Seriall/0 (in): status, myseq 290 RT IE 1, length 1, type 0 RT IE 3, length 2, yourseq 107, my seq 290 PVC IE 0x7, length 0x6, dlci 112, status 0x2 bw 0 Seriall/0 (out) : StEnq, myseq 291, yourseq 107f DTE up Datagramstart = 0xl959DF4, datagramsize = 13 FR encap = 0xFCF10309 00 75 01 01 01 01 03 02 D7 D4In the above output, the router first receives an answer to its 290th LMI status query sent by the switch on interface Seriall/0, which is the first line of debug output. On line 5, the router sends the 291st status query (StEnq) to the switch oVideo 25.04 A multimedia demonstration of using the command debug frame-relay Imi on the router is included in the companion digital resource to this book.25.3.4 Configuring PVCsWhile the previous two subsections described how to configure the interaction between a router (DTE) and a carrier switch (DCE), this subsection goes a step further and demonstrates how to send data between two frame-relay DTEs. As mentioned earlier in this chapter, to send data to another DTE, you must first create a VC, which can be either a PVC or an SVC; the CCNA exam only covers PVCs, so this book discusses only the configuration of PVCs.The first problem you must solve is that the router does not know which PVC to use by default, nor does it know which device is connected to each PVC. As mentioned earlier, PVCs are assigned unique addresses (DLCIs) that are only locally meaningful. The router must somehow be informed of the VC's DLCI number and the Layer 3 address of the device at the remote end of the VC, which is analogous to the problem of how a device using an IP address can communicate over an Ethernet using a MAC address. In TCP/IP, the Address Resolution Protocol ( ARP) is used to solve this problem. In Frame Relay, there are two ways to solve this problem: manual parsing and dynamic parsing. These resolutions map the Layer 3 address of a remote Frame Relay DTE to the local DLCI number that the router uses to travel to that DTE. The next few subsections describe how to configure these two types of resolution.Manual ParsingTo use manual resolution to resolve the Layer 3 address at the remote end to a local DLCI number, use the following configuration.Router(config)# interface serial [slot_#/] port_# Router(config-if)# frame-relay map protocol_name destination_address local_dlci_U [ broadcast] [ietf | cisco]Chapter 25 Frame Relay 695