Table of Contents
What is OSPF and how it works?
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.
What are the advantages of OSPF?
OSPF supports/provides/advantages –
- Both IPv4 and IPv6 routed protocols.
- Load balancing with equal-cost routes for the same destination.
- VLSM and route summarization.
- Unlimited hop counts.
- Trigger updates for fast convergence.
- A loop-free topology using SPF algorithm.
- Run-on most routers.
- Classless protocol.
What is OSPF known as?
Open Shortest Path First (OSPF) is classified as an Interior Gateway Protocol (IGP). This means that it distributes routing information between routers belonging to a single autonomous system (AS), a group of routers all using a common routing protocol.
What is OSPF in CCNA?
OSPF (Open Shortest Path First) is a link state routing protocol. Because it is an open standard, it is implemented by a variety of network vendors. OSPF will run on most routers that doesn’t necessarily have to be Cisco routers (unlike EIGRP which can be run only on Cisco routers).
Is OSPF distance vector?
OSPF is not a distance-vector protocol like RIP, but a link-state protocol with a set of metrics that can be used to reflect much more about a network than just the number of routers encountered between source and destination. In OSPF, a router attempts to route based on the “state of the links.”
What port number is OSPF?
89 port
Difference between OSPF and BGP
| S.NO | OSPF |
|---|---|
| 6. | In OSPF internet protocol is used. |
| 7. | It works in 89 port number. |
| 8. | OSPF is a Link State type. |
| 9. | In OSPF Dijkstra algorithm is used. |
When should I use OSPF?
OSPF is primarily used for internal routing because it’s a link-state routing protocol. OSPF is based on Dijkstra’s algorithm for finding shortest paths between two points.
Is OSPF a WAN protocol?
Networking Basics: OSPF Protocol Explained. Enterprise networks that outgrow a single site will often use OSPF to interconnect their campuses and wide area networks (WANs). If you’re considering a dynamic routing protocol because your network has outgrown static routes, OSPF might seem a little daunting.
What uses OSPF metric?
Open Shortest Path First (OSPF) uses “Cost” as the value of metric and uses a Reference Bandwidth of 100 Mbps for cost calculation. The formula to calculate the cost is Reference Bandwidth divided by interface bandwidth. For example, in the case of 10 Mbps Ethernet , OSPF Metric Cost value is 100 Mbps / 10 Mbps = 10.
What is OSPF and how does it work?
OSPF (Open Shortest Path First) Using OSPF, a router that learns of a change to a routing table (when it is reconfigured by network staff, for example) or detects a change in the network immediately multicasts the information to all other OSPF hosts in the network so they will all have the same routing table information.
What are the advantages and disadvantages of OSPF?
Disadvantages of OSPF: OSPF is very processor intensive. OSPF maintains multiple copies of routing information, increasing the amount of memory needed. Using areas, OSPF can be logically segmented (this can be a good thing and a bad thing).
What does OSPF stand for?
OSPF:- OSPF stands for Open Shortest Path First . It’s an Interior Gateway Protocol (IGP) for the internet and used for exchange the routing information between autonomous systems. OSPF designed by the Internet Engineering Task Force (IETF). OSPF firstly introduced in 1989 and defined in RFC 1131 and it’s also known as OSPF version 1.
What do you need to know about OSPF?
Introducing OSPF. OSPF is a Link-State Routing (LSR) protocol.