OSPF 224.0.0.5（AllSPFRouters）和224.0.0.6（AllDRouters）的区别

最新推荐文章于 2025-10-14 19:33:56 发布

最新推荐文章于 2025-10-14 19:33:56 发布 · 4.6k 阅读

本文详细解析了OSPF协议中两种关键多播地址的作用：224.0.0.5用于所有SPF路由器之间的通信，224.0.0.6用于所有DR路由器之间的通信。重点阐述了这两种地址在协议过程中的具体应用。

DRother向DR,BDR发送DD,LSA request或者LSA UPdate时目标地址是AllDRouter(224.0.0.6)
DR,BDR向DRother发送DD,LSA Request或者LSA Update时目标地址是AllSPFRouter(224.0.0.5)
AllSPFRouters
This multicast address has been assigned the value
224.0.0.5. All routers running OSPF should be prepared to
receive packets sent to this address. Hello packets are
always sent to this destination. Also, certain OSPF
protocol packets are sent to this address during the
flooding procedure.
AllDRouters
This multicast address has been assigned the value
224.0.0.6. Both the Designated Router and Backup Designated
Router must be prepared to receive packets destined to this
address. Certain OSPF protocol packets are sent to this
address during the flooding procedure.