CCNA Routing & Switching : OSPF seven stages

• OSPF stand for Open Shortest path first
• OSPF is an open standard routing protocol that’s been implemented by a wide variety of network vendors, including Cisco
• It’s a link state protocol
• OSPF works by using the Dijkstra algorithm , First, a shortest path tree is constructed, and
• Then the routing table is populated with the resulting best paths.
• Unlimited hop count
• Metric is cost (cost=10 ^8/B.W.)
• Administrative distance is 110
• It is a classless routing protocol
• It supports VLSM and CIDR

[akshayjindia]

Thanks sir, I am waiting in interview room, where I felt the need for reviewing the ospf neighbour discovery process and this process helped greatly.

[manishvishwakarma]

Great job are one of the best teacher in my life... Thanks and respect to you.

[sanjayekbote]

During the OSPF states explanation [ timing 4:04] the diagram is showing 244.0.0.5 which should be 224.0.0.5. apart from that you have explained the concepts very good.

[pcsrinivaskadajari]

Thank you very much for excellent explanation of 7 stages

[vigneshradhakrishnan]

Thanks for the excellent explanation of OSPF

[vivekbalodi]

Great sir, I never seen any online video like this. you are amazing teacher sir.
and this is my first comment on any social media's videos.../
I really like this sir...

[vivasaprissaelcampeo]

great explanation, hadn't understood it as well as now, thanks !

[RahulVerma-pkqi]

Dear Sir As per your video R2 will unicast hello but as per captured hello packet its Multicast only to 224.0.0.5
. Please explain.

[biscuit]

appreciate your explanation simply superb

[flowingwithlife]

Thanks Sir for Explaining so Clearly :)

[ahmadshahhamdard]

Tnx alot for gud explaination sir !
If its possible please explain about Administrative Distance !

[chjagadish]

Thanks for this video.. Nice explanation.. Please
Update me if have more videos related Routing & Switching.

[siddharthkatariya]

why area 0 is considered as backbone area and why must all other areas must pass through it ??

[vtwl]

are you recording this while you are stucked in traffic?

[kadalai_mittai]

Boss can you able to share full OSPF topology details...

[samratbhattarai]

Sorry but the ospf multicast address for all DR other is wrong ( wrong=244.0.05) it should be 224.0.0.5....

[Techtips]

when are you going to post new ccna 3.0 videos

[pranays]

really man! where is master and slave roles in this process and what about attempt state?
plz dont make a video if you dont know the whole process

[shivamsingh-hzmf]

Content is good but before putting a video you should verify the content..
the diagram is showing 244.0.0.5 which should be 224.0.0.5.

[NetworkEngineer]

OSPF has 8 stages. You forgot to put the "Attempt" state. Down, Attempt, Initiate, Two-way, Exstart, Exstate, Load, and Full