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  OSPF Multi-Area Configurationg We will use the following topology: Above we have R1 and R2 in area 0, the backbone area. Between R1 and R3, we will use area 1 and between R2/R4 we will use area 2. R3 and R4 have a loopback interface with an IP address that we will advertise in their area. Configuration Let’s start with all network commands to get OSPF up and running. The network command defines to which area each interface will belong.First, we will configure R1 and R2 for the backbone area: R1(config)# router ospf 1 R1(config-router)# network 192.168.12.0 0.0.0.255 area 0 R2(config)# router ospf 1 R2(config-router)# network 192.168.12.0 0.0.0.255 area 0 Let’s configure R1 and R3 for area 1: R1(config)# router ospf 1 R1(config-router)# network 192.168.13.0 0.0.0.255 area 1 R3(config)# router ospf 1 R3(config-router)# network 192.168.13.0 0.0.0.255 area 1 R3(config-router)# network 3.3.3.3 0.0.0.0 area 1 And last but not least, R2 and R4 for area 2: R2(config)# router ospf 1 ...

  Hot Standby Router Protocol (HSRP) #cybersecurity #coursera #quiz #solution #network HSRP 2 different networks configurations and verification Video Tutorial click here:   Hot Standby Router Protocol (HSRP) is a CISCO proprietary protocol, which provides redundancy for a local subnet. In HSRP, two or more routers gives an illusion of a virtual router. HSRP allows you to configure two or more routers as standby routers and only a single router as an active router at a time. All the routers in a single HSRP group shares a single MAC address and IP address, which acts as a default gateway to the local network. The  Active router  is responsible for forwarding the traffic. If it fails, the  Standby router  takes up all the responsibilities of the active router and forwards the traffic. Some important terms related to HSRP : Virtual IP :  IP address from local subnet is assigned as default gateway to all local hosts in the network. Virtual MAC address ...

 #ospf #protocol #configuration #lab #DR #BDR Lab objectives: Ensure router R1 is the DR for network 100.1.1.0 /24. Ensure router R3 is the BDR for network 100.1.1.0 /24. Ensure router R5 is the DR for network 100.1.2.0 /24. without changing the priority Ensure router R2 is the BDR for network 100.1.2.0 /24. You are not allowed to change the priority. Solution configurations: R1: conf t int fa 0/0 ip address 100.1.1.2 255.255.255.0 no shutdown exit router ospf 10 network 100.1.1.0 0.0.0.255 area 0 network 100.1.2.0 0.0.0.255 area 0 log-adjacency-changes conf t router ospf 10 log-adjacency-changes exit exit R2: the solution to achieve all objectives: change priority of R1 must be higher than R3 change priority of R2 must be lower than R1 change router-id manually to higher router ID 120.120.120.2