Share this post on:

OSPF states, so I won’t never forget them 😉

DOWN

No hellos have yet been received. Routers start with sending hello’s on multicast port 224.0.0.5

INIT

Once R2 receives the hello, the state turns into INIT state

2 WAY

R2 replies with UNICAST hello packet. BDR / DR election happens here too.

EX-START

DR and BDR start exchanging link state information by sending data base description.

LOADING

Routers exchange missing information (they know that from data base description). R1 sends Link State Request and R2 replies with Link State Update.

FULL

Databased are synchronized and routes are exchanged.

Leave a Comment

Your email address will not be published. Required fields are marked *