Скачать или смотреть How To Configure OSPF in GNS3 - OSPF Routing Configuration Step by Step - OSPF Basic Concepts

How To Configure OPSF in GNS3 | Open Shortest Path First protocol.OSPF Concepts. Hi this mohd salman's tutorial video about ospf routing protocol..cisco ospf protocol.
The OSPF (Open Shortest Path First) protocol is one of a family of IP Routing protocols, and is an Interior Gateway Protocol (IGP) for the Internet, used to distribute IP routing information throughout a single Autonomous System (AS) in an IP network.
An introduction to Open Shortest Path First(OSPF). This video explains OSPF features, OSPF hierarchy, configuring OSPF, verifying OSPF and gives OSPF details.
best CCNA Course on the Web.OSPF is perhaps the most widely used IGP in large enterprise networks
To enable OSPF on a Cisco router and advertise interfaces, the following tasks are required:
Step 1- Use the command router ospf process ID to start OSPF.
Step 2 -Use the network command to enable the interfaces.
Step 3 -Identify area assignments.
Step 4 -(Optional) Assign the router ID.
OSPF has no hop count limitations. RIP has 15 hops only.

OSPF understands variable-length subnet masks (VLSMs) and allows for summarization.
OSPF uses multicasts (not broadcasts) to send updates.
OSPF converges much faster than RIP, because OSPF propagates changes immediately.
OSPF allows for load balancing with up to six equal-cost paths.
OSPF has authentication available. (RIPv2 does also, but RIPv1 does not.)
OSPF allows for tagging of external routes injected by other autonomous systems.
OSPF configuration, monitoring, and troubleshooting have a far greater IOS tool base than RIP.