Configuration of OSPF in Multiple Areas

Minnie Roger and today we are going to configure OSPF in multiple areas first of all take for outers like this then take switches on the both end routers and the end devices that are the computers computers connect them all yes then here now let me specify the areas first this would be the area one the network in between these two routers will be area zero and this network will be area two so there are three areas area one area zero and area to remember in OSPF for transferring packets between different areas all the areas must be connected with area zero must be connected it's compulsory now first of all we'll give the specify the IP addresses so that we we can know what PC is assigned what IP errors sooner one six eight starts to dance three now to the router interfaces first here which would be default gateway of the network here it would be 192.168.1 now the between networks 10.0.0.0 which is 10.00 to your IP over here that is xx dot so that's where that one and yeah trainee dot 0 dot 0 dot - yeah tacky Roger that's a that 10.1 yeah 13.0 that's a lot - now assign the IP addresses to the computers 192.168 1.2 you know 192.168.20.10 192.168.0 go to router zero come online snow return enable the router development server so it was a spelling mistake now it's enabled and go to the configuration mode now select the interface FA 0/0 give the IP address to it which we set over here yeah this one so give the IP address 192.168.1.1 space 255.255.255.0 this is the subnet mask now give the nose shut command to turn on the interface now exit select the interface serial 2/0 assign the IP address as 10.0.0.0 5 dot 0 dot 0 dot 0 now shut yeah it is showing that the change yeah it changed it state to down type another time no command to start the interface again now exit the router and go to the next router in that CLI now return enable configure terminal and that select interface se 2/0 give the IP address as 10.0.0.0 dot 0 dot 0 dot 0 give the no-shit command to start the interface the interfaces and main started now exit select the interface se3 slash zero oh sorry now give the IP address 20 dot 0 dot 0 dot one space 255.0.0.0 now give no shut you know should once again and then exit now switch to next router here no return enable oh so enable then configure terminal and that select the interface as a 3/0 give the IP address 20 dot 0 dot 0 dot to space 255.0.0.0 give the no-shit command and you can see the interfaces having started now exit change the interface to sa-2 slash give the IP address 30.0 no shut command and exit now switch to the last router in that no enable configure terminal and that's select interface fa 0 / 0 that is fast ethernet give the IP address 192.168.1.1 which we specified 0 give no shut command yeah now exit select the interface as in 2/0 give the IP address as 30.00 to 255.0.0.0 give the no shut command now exit you can see all the interfaces are now being started we have assigned IP addresses to each and every interface of the routers and the computers now we are going to configure OSPF go to the first router in that in configuration mode type router OSPF and the process ID number remember process ID number you can select any number between 100 to 60 5635 now give the network for OSPF that is the directly connected networks that is 192.168.1.0 and the wildcard mask of that remember OSPF uses wildcard mask wildcard mask is the rivers of the subnet mask so whenever giving networks in OSPF you must specify the wildcard mask and now the area the area would be one as it as we specified over here so area one then network 10.0.0.0 2 5 0 dot 0 dot 0 dot 2 5 5 it would be also in area 1 now exit now switch to the second router now the second router is the area border router for area 1 and area 0 it is a router that connects area 0 and area 1 with each other the interface SC to 0 of the router is included in area 1 and the interface ac30 is included in area 0 hence it is on the border of the both areas it is known as area border router first of all go to router OSPF 1 give the directly connected networks first of all the network which is on the left side it is 10.0.0.0 space 0 dot 0 dot 0 dot 255 which is an area of 1 now the network on the right hand side 20 dot 0 dot 0 dot 0 space 0 dot 0 dot 0.255 and this network is specified in area zero as I told so here it would be area zero now exit and switch to the next router here go to router OSPF one give the directly connected networks that is 20 dot 0 dot 0 dot 0 space 0.0.0.0 5 area 0 here the serial port 3 0 is included in area 0 and 2 0 is included in area 2 hence this router is the area border router of area 0 and area to now give another network as 3rd P dot 0 dot 0 dot 0 0 dot 0 dot 0.25 5 which would be in area 2 yes exactly now exit and switch to the next and the last router here router OSPF 1 give the network directly connected network that is 30.0 dot 0 dot 0 0 dot 0 dot 0 dot 255 area to another network would be 192.168.0.0 space 0.25 v dot 255 dot 255 and area 2 you can see all the routes are being fully loaded all the networks are specified now go to any of route and it out any internal router of any area and type the command do show IP route now it is showing the directly connected routes with c and o IA o i8 it means OSPF inter area it means the networks are in another area that's why it is representing o i a that is oh for oh s PF and is for OSPF inter area routing so you can see the routes are displayed as inter area as they are in another area now give the default gateways to the machines rightly here it would be 192.168.1 now go to the PC and try to ping it to the computer in area 2 that is 192.168 the 2.3 and there you can see it is responsive the OSPF inter area configuration has been completed thank you for watching

Channel: Mihir Gajjar

Views: 31,374

Rating: 4.7058825 out of 5

Keywords: tag1, tag2

Id: KhMBx_HHOlY

Length: 15min 9sec (909 seconds)

Published: Tue May 10 2016