ccna 200 301 syllabus of upsc epfo enforcement

ccna 200 301 syllabus of upsc epfo enforcement.From the above output, you can see that router R2 to 192.168.1.0/24 route has two next hops, that is, to R1 or R3 are available, the default will use load balancing, that is, to 192.168.1.1 and to 192.168.1.129 packets should be one to the left and one to the right, but the result is why it is to 192.168 1 are through The result is that the 192.168.1.129 to 192.168.1.129, but one did not pass. The reason for this phenomenon is that Cisco routers use fast switching by default, the first packet query routing table, the subsequent packets are forwarded according to the first data cache path, just 192.168.1.1 the first ping packet to the left, all subsequent packets to 192.168.1.0/24 to the left, which appears in front of the phenomenon. Turn off fast switching on router R2 and enable process switching (each packet queries the routing table, which slows down the router's processing).R2#conf t R2 (config)#no ipcefagain on router R2 ping 192.168.1.1 and 192.168 129, the results show the following.Sending5r100-byteICMPEchostoU! !U 192 *168.1.1,timeoutis2seconds:round-trip Success rate is 40 percent (2/5), R2#ping 192.168.1.129 min/avg/max = 4/8/12 ms: :; ; ;Type escape sequence to abort. sending 5,100-byte ICMPEchos toU! . !U: ::::Success rate is 40 percent (2/5), : ::. W";'. 192.168.1.129, timeoutis 2secondsround-trip min/avg/max = 4/6/8 ms R2#ping 192.168.1.1 From the above output, you can see that the packets sent by R2 to 192.168 ? 1 and 192.168.1.129 are a pass and a fail, router R2 according to the routing table load balancing, resulting in ping packets sent in the direction of a correct one incorrect. The reason for this phenomenon is that RIPvl is a classful routing protocol that automatically summarizes at the boundary of the primary classful network, and this summarization cannot be turned off. Execute the "udebug ip rip" command on router R1 to check the RIP updates sent from router R1 to R2, and the following is displayed: Rl#debug iprip RIP protocol debugging is on179X