What protocol does OSPF use?
Open Shortest Path
Open Shortest Path First (OSPF) is a routing protocol for Internet Protocol (IP) networks. It uses a link state routing (LSR) algorithm and falls into the group of interior gateway protocols (IGPs), operating within a single autonomous system (AS).
What is OSPF protocol and how it works?
The OSPF protocol is a link-state routing protocol, which means that the routers exchange topology information with their nearest neighbors. The topology information is flooded throughout the AS, so that every router within the AS has a complete picture of the topology of the AS.
Is OSPF proprietary protocol?
OSPF (Open Shortest Path First) is perhaps the most popular link state routing protocol. It is an open standard so it can be run on routers produced by different vendors, which is in contrast to EIGRP, a Cisco proprietary protocol that can be run only on Cisco devices.
Is OSPF a layer 3 protocol?
At Layer 3, routers will use dynamic routing protocols (generally Open Shortest Path First or OSPF and BGP in most enterprises) to present a robust network that handles site-to-site link failures and minimizes the burden of IP management.
Why OSPF is preferred over BGP?
Scale: BGP is more flexible and scalable than OSPF and it is also used on a larger network. Preferred path: OSPF is used to determine the fastest route while BGP puts emphasis on determining the best path.
What is Cisco proprietary routing protocol?
IGRP and EIGRP are Cisco’s proprietary distance-vector routing protocols with low performances and are non-mainstream IGP routing protocols. They can be replaced by OSPF or IS-IS. FlexLink is a Layer 2 switchover protocol and achieves better convergence performance than STP.
Is a proprietary Cisco protocol?
EIGRP is a Cisco proprietary routing protocol loosely based on their original IGRP. EIGRP is an advanced distance-vector routing protocol, with optimizations to minimize both the routing instability incurred after topology changes, as well as the use of bandwidth and processing power in the router.
What is Hello protocol?
The Hello protocol in OSPF allows each router in a network to check whether it can exchange messages with neighboring routers in its network. The hello period is the time period between sending two successive hello messages to the same neighbor.
Is OSPF Area 0 required?
Albeit OSPF is a link state protocol, the way OSPF handles inter-area traffic leaves it prone to routing loops. This is why OSPF must connect back to area 0 – to avoid routing loops.