2.4.11 Packet Tracer - Modify Single-Area OSPFv2

modify single area ospf version 2 addressing table 3 routers 3 pcs and 1 server three routers three pcs one pc on each lan on each local area network and a server on internet on the cloud modify ospf default settings test connectivity between old and devices before modifying the ospf settings verify that all pcs can ping the web server and each other for example go to pc1 command prompt and ping all devices for example pc2 okay from pc1 pc2 and pc2 ip address is 172 16 2 2 17 2 16 2 2 okay from pc1 enter success okay success and uh being from pc one pink to pc three and pc3 ib address is 180 168 one from pc1 ping 192 160a one two enter success success and finally pick from pc one ping the web server okay the web server iprc 64 101.2 okay from one pin 64 101 to enter okay success very good adjust the hello and that timers between r1 and r2 okay between r1 and r2 there is a link this link this serial link and you will modify the settings of this link on r1 go to interface serial 0 0 okay on r1 the interface here 0 0 0 is the connection to r2 so that's why you will modify the cl000 ospf configuration and set the hello interval to 15 okay 15 seconds and that interval to 60 seconds okay go to r1 the command line interface enter enable configure terminal interface zero zero zero zero ib ospf ospf hello dash interval 15 seconds and that interval that interval dash interval to 60 sequence okay and now after a short period of time the ospf connection with r2 will fade so you will see these log messages okay these messages and the is down full down okay and wait a moment and you will see that this router r1 okay now you can see the ospf process okay that timer expired is down down okay both sides of the connection need to have the same timer values in order for the adjacency to be maintained identify the interface on r2 that is connected to r1 adjust the timers on the r2 interface to match the settings on r1 okay the connection from r2 to r1 is also the interface serial 0 0 with on r2 and configure this interface serial 0 0 with the same values as r1 okay go to r2 the command line interface on r2 enter enable configure terminal okay is the same interface serial zero zero on r2 interface zero zero zero zero and set the same values ip spf hello interval 15 ipo spf that interval 60 ib ospf ospf hello dash interval 15 enter and ipo spf that interval 60 and okay and after a brief period of time you should see a status message that indicates that the ospf adjacency has been re-established okay and you will see this ospf process one a new knife or and serial zero zero zero full okay loading down okay very good establish okay and the question is uh how to verify this this intervals for example on r2 go to okay enter and and to go privilege excellent mode and show ap ospf interface okay show ip ospf interface enter space space and verify the this is the gigabit interface serial zero zero zero okay this is the interface i want to review serial zero zero zero okay and timer intervals hello 15 and that timer is 60. okay very good you can verify this if you see serial 0 0 1 okay this on r2 this another interface serial 001 you will see the by default the hello is 10 and that interval is 4d and you change it on serial 0 0 on 0 different values hello 15 and that 60 very nice adjust the bandwidth settings on r1 trace the path between pc1 and the web server located at 64 101.2 okay from pc1 try search to web server okay go to pc1 web server ipl 64 100 1 2 64 1012 enter okay you have four hops okay 172 16 one is this gigabit zero zero once id two sixteen one one this r1 gigabit zero zero okay so the first hub is r1 okay and the second hub is 172 1632 172 1632 serial zero zero zero on r2 serial zero zero zero on r2 so the second hub is r2 fields hub r1 single hub r2 go to pc1 another hub 209165 226 okay it's another router in internet cloud is the third hub and finally 64 10112 is the server okay four hops one two three and four hops very good very good and on the r1 serial zero zero interface set the bad white to 64 kilobits per second okay on r1 on serial zero zero zero set 64 kilobits per second okay this does not change the actual power speed only the metric that the ospf process on r1 will use to calculate the best routes okay so on r1 interface serial zero zero zero change the bandwidth to 64. okay with 64 kilobits per second okay go to r1 enter and to go privilege xml and verify fields and before to do this verify the current bandwidth okay show interface cl000 okay this interface serial 0 0 show interface 0 0 0 0 the space and you will see this bandwidth 1 54 kilobits per second okay or one megabit and a half okay 1544 kilobits per second and change only to a lower value 64 kilobits per second okay configure terminal interface here zero zero zero bandwidth 64 kilobits per second enter okay and and verify show interface serial 0 0 0 and now bandwidth only 64 kilobits per second trace the path between pc1 and the web server located at 64 101.2 okay go to pc1 and repeat the command tracer to the server enter and now you will have five hops the first hop is 172 16 1 1 okay 172 16 1 1 gigabit zero zero on r1 so the third top is r1 the second hop is 182 168 10 6. okay uh 182 168 and six serial zero zero zero on r3 okay serial zero zero zero on r3 so the second hub is r3 the third hop is 172 16 3 2 okay 192 16 32 on r2 so r2 is the third hop uh 209 165 200 226 is a router on internet cloud default hop and finally the server the fifth hub okay from pc1 the path is go to r1 to r3 r2 the cloud and finally the web server this is the path [Music] notice that the path from pc1 to the server is redirected through r3 ospf prefers the lower cost path okay okay this link has a lower bandwidth so the cost is higher okay higher than the than this another link okay and go to r1 and review the [Music] remember show interface zero zero zero zero shows the band by 64 kilobits and you can show the cost show ip ospf interface interface serial 0 0 0. okay okay show interface zero zero zero zero shows uh the bandwidth 64 kilobits and show ip ospf interface 0.000 shows the cost and it's 1562 okay with review the bad y on serial 01 on r1 show interface here zero zero one enter the space and the band y is uh that i found 1544 kilobits per second and show ap ospf interface serial 0 0 1 and the cost is 64. so the cost of serial 01 64 is a lower value than the cost of serial 0 interface so that's why this another path is preferred than the previous path okay or if verify connectivity verify that all pcs can pick the web server and each other okay go to pc1 ping pc2 pc2 ib others 132 1622 okay pink 172 16 2 2 success and pink pc3 180 160 a 1 2 18 168 1 2 success and pick the server 64 10112 ping the server 64 10112 success okay completion 100 thank you thank you very much you

Channel: Christian Augusto Romero Goyzueta

Views: 1,317

Keywords: ensa, enterprise networking, security, automation, ccna, version 7, ccna 7, ospfv2, ospf, hello interval, dead interval, bandwidth, cost

Id: 8ziKEP5h4TU

Length: 15min 19sec (919 seconds)

Published: Thu Aug 13 2020