Category Archives: ospf

Open Shortest Path First Link-state protocols build IP routes with couple of major steps.first,the routers together build a lot of information about the network,router,links,ip add,status information,and so on.Then the routers flood the information,so all routers know the same information.At that … Continue reading →

Objectives: (i)configure multiarea OSPF on router. (ii)verify which router is Area Border Router (ABR). (iii)configure OSPF authentication.     Step 1 – IP addressing     Step 2 – Advertise interfaces to OSPF   R1(config-router)#do sh run | s ospf … Continue reading →

  Objectives: (I) Configure multi-area OSPF on a router. (ii) Verify Multi-area behavior. (iii)Create an OSPF virtual Link. (iv) Summarize an area. (v) Generate a default route into OSPF     Step 1 -ip addressing on all routers     … Continue reading →

  Objectives (i) Verify OSPF adjacencies. (ii) Verify OSPF routing information exchange. (iii) Modify OSPF link cost. (iv) change interface priority.     Step1 – configure addressing physical and loopback interfaces. R1(config)#interface loopback 0 R1(config-if)#ip address 1.1.1.1 255.255.255.255 R1(config-if)#no shutdown … Continue reading →

R1 interface Loopback0 ip address 1.1.1.1 255.255.255.255 ! interface FastEthernet1/0 ip address 10.1.13.1 255.255.255.0 ! interface Serial2/1 ip address 10.1.12.1 255.255.255.0 ! router ospf 1 network 1.1.1.1 0.0.0.0 area 0 network 10.1.12.0 0.0.0.255 area 0 network 10.1.13.0 0.0.0.255 area 0 … Continue reading →