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Single-Area OSPFv2 Concepts - Coggle Diagram
Single-Area OSPFv2 Concepts
Components
Routing Protocol Messages
Link-state request packet
Link-state update packet
Database description packet
Link-state acknowledgment packet
Hello packet
Advertise parameters on witch two routers must agree to become neighbors
Elect the Designated Router and Backup Designated Router on multiaccess networks like Ethernet
Discover OSPF neighbors and establish neighbor adjacencies
Data Structures
Link-state database
Forwarding database
Adjacency database
Algorithm
The topology table is based on the SPF algorithm
Link-State Operation
Build the Link State Database
Execute the SPF Algorithm
Exchange Link-State Advertisements
Choose the Best Route
Establish Neighbor adjacencies
Multiarea OSPF
Reduced link-state update overhead
Reduced frequency of SPF calculations
Smaller routing tables
OSPFv3
Is the counterpart of OSPFv2, using IPv6
OSPF Operational States
Two-Way State
Init State
ExStart State
Exchange State
Down State
Loading State
Full State
Establish Neighbor Adjacencies
The Init State
Two-Way State
Down State to Init State
Elect the DR and BDR