#What is loopback interface drivers
#What is loopback interface software

Any traffic that a computer program sends to a loopback IP address is simply and immediately passed back up the network software stack as if it had been received from another device. O 10.0.0.2/32 via 192.168.12. Loopback is a virtual interface that is an integral part of all TCP/IP network interfaces on all generally available operating systems. The reason you want to configure a loopback interface on a router is because if you donвЂ™t, the highest active IP address on a router at the time of bootup. They can be used for diagnostic purposes as well as OSPF configuration. R1гЃ®гѓ«гѓјгѓ†г‚Јгѓіг‚°гѓ†гѓјгѓ–гѓ«гЃЇд»Ґдё‹гЃ®йЂљг‚ЉгЃ§гЃ™гЂ‚ДЎ0.0.0.0/8 is variably subnetted, 2 subnets, 2 masks Using loopback interfaces with your OSPF configuration ensures that an interface is always active for OSPF processes.

#What is loopback interface drivers

The loopback interface allows IT professionals to test IP software without worrying about broken or corrupted drivers or hardware. To do so, change the network type to POINT_TO_POINT in Lo1.Д«y changing the network type to POINT_TO_POINT, the route 10.1.1.0/24 will be advertised from R2. Loopback address is a special IP number (127.0.0.1) that is designated for the software loopback interface of a machine. Next, advertise the route of Lo1 with the configured subnet mask of 10.1.1.0/24 instead of the host route. Loopback interface is treated as a stub HostДЄnd the routing table on R1 is as follows.ДЎ0.0.0.0/32 is subnetted, 1 subnets O 10.0.0.2 via 192.168.12.2, 00:33:56, FastEthernet0/0 Figure The route of the loopback interface is the host route. Process ID 1, Router ID 2.2.2.2, Network Type LOOPBACK, Cost: 1

If you look at show ip ospf interface loopback0 on R2, you will see that the network type is вЂњLOOPBACKвЂќ.

No special configuration is done, so the Lo0 route will be advertised as the /32 host route вЂњ10.0.0.2/32вЂќ. Advertising the Lo0 routeД®nable OSPF on Lo0 and advertise the Lo0 route with OSPF. Then, make sure to advertise the routes of Lo1 to Lo3 with subnet mask /24. Treat the route of Lo0 as a host route with /32. LetвЂ™s start with R1 and R2 with OSPF enabled on Fa0/0 as Area 0 interfaces and as neighbors. Loop device In Unix like operating systems, a loop device, vnd (vnode disk), or lofi (loopback file interface) is a pseudo device that makes a file.