Quick Answer: What Is The Advantage Of BGP Protocol?

Which is better OSPF or BGP?

BGP is more flexible and scalable than OSPF and used on a larger network, unlike OSPF.

The primary objective of the OSPF is to determine the best route, i.e., fastest.

Conversely BGP emphasizes on determining the best path.

OSPF uses link state routing while BGP uses path vector routing..

Why we use OSPF?

The idea behind the OSPF areas is to lower the amount of routing traffic and lower the processing of your core routers. Different areas are connected with each other through Area Border Router (ABR). OSPF is link state routing protocol and you can tune a link state routing protocol to converge fast.

Why do we need BGP protocol?

Border Gateway Protocol (BGP) is used to Exchange routing information for the internet and is the protocol used between ISP which are different ASes. The protocol can connect together any internetwork of autonomous system using an arbitrary topology.

When should we prefer BGP in networking?

In this article, I’ll give you five scenarios where BGP is the best match for your network requirements.Internet service advantages. … Layer 3 VPN services. … Increasing network stability. … Automatic Response to Denial-of-Service Attacks. … Large-scale QOS or web caching deployment. … 2 comments.

Why is BGP slow protocol?

Keep in mind, though, BGP is a “slow to converge” protocol. Routing changes on the Internet occur all the time. If BGP had to react to every change, it would flood the Internet with routing updates that could slow traffic all over the globe. … This is why BGP is seldom used as an internal routing protocol.

Why BGP is used in MPLS?

In a MPLS network that is used to provide internet services and L3 VPN services BGP is typically carrying the internet routing table, customers’ IPv4/IPv6 routing information and VPNv4 routing information with VPN labels. … To summarize; BGP is used to carry the following information: Internet routing information.

Where is BGP protocol used?

BGP is always used as the routing protocol of choice between different ISPs, which is known as external BGP. Large ISPs also use BGP as the core routing protocol within their own networks, which is called internal BGP.

What algorithm does BGP use?

A BGP router forms a neighbor relationship by connecting to its neighbors and exchanging the routes, once the connection is established. BGP Best Path Selection Algorithm is used to choose and install the best routes into the router’s routing table.

Why OSPF is preferred over BGP?

BGP is considered to be more flexible as well as scalable than OSPF and it would be also used on a larger network. OSPF would be used to determine the fastest route whereas the BGP would be putting emphasis on determining the best path. Well, Because OSPF stub areas which would be a total mess to configure.

Does OSPF uses TCP or UDP?

Unlike other routing protocols, OSPF does not carry data via a transport protocol, such as the User Datagram Protocol (UDP) or the Transmission Control Protocol (TCP). Instead, OSPF forms IP datagrams directly, packaging them using protocol number 89 for the IP Protocol field.

Is BGP a layer 3 protocol?

For the most part, routing is a layer-3 function, but, as you pointed out, BGP uses a layer-4 protocol to communicate with other BGP speakers in order to do what is normally considered a layer-3 function. Many network protocols fall into a gray area, or are considered in one layer while using another layer.

Does OSPF use hop count?

With RIP, a destination that requires more than 15 consecutive hops is considered unreachable, and this limitation inhibits the maximum size of a network. OSPF has no hop limitation. You can add as many routers to a network as you want.