RRAS Routing and Remote Access Service (Farsi User Guide)
Resource: Windows 2000 Server Resource kit Internetworking Guide

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OSPF Communication on OSPF Networks

سه نوع شبکه وجود دارد که OSPF در آنها فعالیت می کند .

 
Broadcast Networks

برای شبکه های Broadcast این Protocol دو آدرس Multicast زیر را رزرو کرده.

224.0.0.5 - AllSPFRouters: Used to send OSPF messages to all OSPF routers on the same network. The AllSPFRouters address is used for Hello packets. The DR and BDR use this address to send Link State Update and Link State Acknowledgment packets.

224.0.0.6 - AllDRouters: Used to send OSPF messages to all OSPF DRs (the DR and the BDR) on the same network. All OSPF routers except the DR use this address when sending Link State Update and Link State Acknowledgment packets to the DR.

 
Point-to-Point Networks

در این نوع  شبکه ها OSPF از آدرس زیر استفاده می کند .

Point-to-Point networks use the AllSPFRouters address (224.0.0.5) for all OSPF messages

 
NBMA Networks

در شبکه های NBMA نمی توان از Multicast Address استفاده کرد .بنابراین  از آدرس ROUTER ها برای برقراری ارتباط و ارسال Hello Packet باید  استفاده شود

NBMA Networks   NBMA networks have no multicasting capability. Therefore, the destination IP address of any Hello or Link State packets is the unicast IP address of a specific neighbor. The neighbor IP address is a required part of OSPF configuration for NBMA network links.
 
RRAS Routing and Remote Access Service (Farsi User Guide)

LastUpdate:2005/04/05

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