When to use ospf

OSPF: Link-State Routing for Internal Use Only OSPF is an Interior Gateway Protocol (IGP). As the name suggests, these are used for internal network routing. This would typically be between switches and routers in the same location. Sometimes OSPF is also used in Layer 2 connections between offices.

1. When should we use OSPF?
2. Why OSPF is preferred over BGP?
3. Why is OSPF better?
4. What is better BGP or OSPF?
5. Is OSPF better than Eigrp?
6. Why is OSPF not used for internet?
7. Does OSPF use TCP or UDP?
8. Can we use BGP and OSPF together?
9. Does OSPF prefer higher cost?
10. What are two purposes of an OSPF?
11. Why is OSPF one of the best protocols used nowadays?
12. Why OSPF does not use TCP or UDP?

When should we use OSPF?

OSPF is primarily used for the LAN and data center but can also occasionally work in WAN and IaaS environments. BGP is most often used for internet redundancy, WAN and IaaS environments, while OSPF is primarily used for the LAN and data center.

Why OSPF is preferred over BGP?

Preferred path: OSPF is used to determine the fastest route while BGP puts emphasis on determining the best path. Protocol: In OSPF, internet protocol is used. While in BGP, transmission control protocol is used.

Why is OSPF better?

OSPF routing protocol has complete knowledge of network topology, allowing routers to calculate routes based on incoming requests. OSPF protocol has no limitations in hop count, unlike RIP protocol that has only 15 hops at most. So OSPF converges faster than RIP and has better load balancing.

What is better BGP or OSPF?

While OSPF uses cost as a metric to determine the best path, BGP uses BGP attributes to determine the best path. Because it is not uncommon to have multiple paths to the same destination, BGP has a best-path selection algorithm to eventually choose the best path (or paths, if BGP multipath is configured).

Is OSPF better than Eigrp?

Both protocols converge faster than other interior gateway protocols or BGP. However, EIGRP is faster than OSPF due to an internal mechanism that we will cover later in this article. In terms of resource requirements, EIGRP does not pose the same burden on the routers for a given scale of the network.

Why is OSPF not used for internet?

Today's routers and switches are usually insulated from this, but it does kick off a lot of work. Imagine if a full table needed to be calculated every time a new dynamic internet routing node was brought online. That scenario could cause some issues and is why OSPF is not suitable for internet routing.

Does OSPF use TCP or UDP?

OSPF routers communicate using IP packets. OSPF messages ride directly inside of IP packets as IP protocol number 89. Because OSPF does not use UDP or TCP, the OSPF protocol is fairly elaborate and must reproduce many of the features of a transport protocol to move OSPF messages between routers.

Can we use BGP and OSPF together?

BGP and OSPF work together in a network to provide reachability (that is, routing) information to routers about networks outside the OSPF network. In a provider network, BGP populates the routing table, with the address of the eBGP neighbor, as the next hop for routes to exterior autonomous systems.

Does OSPF prefer higher cost?

OSPF prefers lowest cost path to the destination. So if you have 2 routers & if your preference is to reach R1 than R2, then manually assign cost on interface connecting to R1 some what lower than R2.

What are two purposes of an OSPF?

to uniquely identify the router within the OSPF domain. to facilitate router participation in the election of the designated router.

Why is OSPF one of the best protocols used nowadays?

OSPF supports complex networks with multiple routers, including backup routers, to balance traffic load on multiple links to other subnets. Neighboring routers in the same broadcast domain or at each end of a point-to-point link communicate with each other via the OSPF protocol.

Why OSPF does not use TCP or UDP?

Since OSPF sits directly on top of IP in the TCP/IP stack, OSPF is required to provide its own reliable mechanism, instead of being able to use a reliable transport protocol such as TCP. OSPF addresses reliable delivery of packets through use of either an implicit or explicit acknowledgment.