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How ospf works

2025-04-02 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Servers >

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# talking about ospf (Open shortest path first), first of all, it is a link-state routing protocol

Its working process mainly has the following points:

# create a neighbor table

Hello: using only hello messages to find neighbors, for neighbor establishment, maintenance, and demolition

Ospf routes are only translated between ospf routers

Neighbor status:

Down: the port does not have ospf protocol enabled

Init: initialization statu

2way: indicates two-way communication status

Exstart: initial state of information exchange

Exchange: information exchange

Loading: information loading

Full: full adjacency statu

Synchronize database

: lsa: link-state advertisements, synchronizing databases

Calculate the routing tabl

# ospf message

Dbd datebase description: database description message, used to achieve reliable database synchronization

Lsu link state update: link-state update message for updating database entries

Lsr link state request: link-state request message, which is used to request database entries

Lsack link state ack: link-state acknowledgement message to achieve reliable message transmission

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