cisco ccna 6 pdf

cisco ccna 6 pdf.The first command clears all dynamic entries in the translation table. Note that to clear the static entries, you need to delete the static NAT configuration video in configuration mode 22.06 A multimedia demonstration of using the command clear ip nat translation on a router is included in the companion digital resource to this book.To troubleshoot, use the debug command in addition to the show command. For example, the command debug ip nat displays the process that the IOS performs to translate each packet, which is useful when determining whether the IOS has correctly translated the packet header and the addressing information in the data segment header. Note that this command will take up a significant number of CPU cycles on the router.To display the router's translation entries, use the command show ip nat translations; to clear dynamic translation entries from the translation table, use the command clear ip nat translations; to display the router performing address translations in real time, use the command debug ip natoThe following is an example of using the command debug ip nat.Router# debug ip nat03:32:23: NAT: s=192.168.1.10->200.200.200.2, d=201.1.1.1 [70] 05:32:23: NAT*: s=201.1.1.1, d=200.200.200.2->192.168.1.10 [70]In the first line of this example, the address of an internal machine (192.168.1.10),the source address in the packet (s=), is translated to 200.200.200.2, and the destination address of that packet is 201.1.1.1 (d=). The second line shows the traffic returned from 201.1.1.1 and the translation from the global internal address to the local internal address. The asterisk (*) indicates that the fast forwarding method was used when forwarding the packet; the number in square brackets ([]) is the packet's identification number, which can be used to associate this information to a packet trace performed by an external protocol analyzer or sniffer.The parameter ft detailed can be specified in the command debug ip nat, which will display a description of each packet that needs to be converted, along with any errors, such as the global address pool not having an address that can be assigned to an outgoing user.Video 22.07 In the companion digital resource to this book, multimedia is included for using the command debug ip nat on a router/page city O