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Network type supported by OSPF

Latest reply: Dec 27, 2018 08:18:13 574 6 9 0 0

Network type supported by OSPF

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1.P2P network:

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Only two routers are interconnected

Support broadcast, multicast packet forwarding


2.Broadcast network

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The broadcast network supports two or more devices to access the same shared link and can support broadcast and multicast packet forwarding. It is the most common network type of OSPF.

At the same time, because there are multiple devices in a broadcast network, neighbor relationship establishment and link information synchronization. OSPF has corresponding features to reduce the adverse effects of multiple devices on the same network.

The above two network types are the most common, in addition to two rare network types


3.NBMA network

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Two or more routers are interconnected via VC

Unlike broadcast networks, NBMA does not support broadcast and multicast packet forwarding by default.

On an NBMA network, OSPF simulates operations on a broadcast network, but each router's neighbors need to be manually configured.

Example of an NBMA type network: a router network connected through a fully interconnected frame relay link

In today's network deployments, NBMA networks are rare.


4.P2MP network

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Considering a non-broadcast network as a group of P2P networks, such a non-broadcast network becomes a P2MP network. On a P2MP network, the OSPF neighbors of each router can be discovered using Inverse ARP. P2MP can be regarded as a collection of multiple P2Ps, and P2MP can support broadcast and multicast forwarding.

No link layer protocol belongs to the P2MP type network by default, which means that it must be forced to be changed to P2MP by other network types. A common practice is to change a non-fully connected frame relay or ATM to a P2MP network.


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dagui
Created Dec 25, 2018 02:01:48

he OSPF neighbors of each router can be discovered using Inverse can you explain this in detail?
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yiyi0519
Created Dec 25, 2018 02:06:33

Nowadays, the networking of P2MP mode is rarely used, and the type of broadcast needs to select DR, which requires special attention.
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xiaomumu
Created Dec 25, 2018 02:20:21

What are the advantages and disadvantages of P2P network and broadcast network respectively? What do you need to pay attention to when choosing?
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user_2915719
Created Dec 25, 2018 06:02:50

OSPF seems a versatile protocol for multiple scenarios. Good to know.
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Hain
Created Dec 27, 2018 08:16:18

No link layer protocol belongs to the P2MP type network by default, which means that it must be forced to be changed to P2MP by other network types. A common practice is to change a non-fully connected frame relay or ATM to a P2MP network?
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DZKM
Created Dec 27, 2018 08:18:13

Two or more routers are interconnected via VC

Unlike broadcast networks, NBMA does not support broadcast and multicast packet forwarding by default.

On an NBMA network, OSPF simulates operations on a broadcast network, but each router's neighbors need to be manually configured.

Example of an NBMA type network: a router network connected through a fully interconnected frame relay link

In today's network deployments, NBMA networks are rare.
!!!!
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  • x
  • convention:

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