CCIE Topic: 1.4a OSPF Adjacencies
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- Опубликовано: 11 окт 2020
- Moving on to the next section of the CCIE blueprint covering OSPF, beginning with the 1.4a topic of OSPF adjacencies. I cover the different OSPF states, and I use Wireshark to capture OSPF traffic for a closer look at our the different state packets.
#cisco #ccie #enarsi #encor #ccna
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The weekend is here, and I am really getting a lot of great information from a great engineer. Thank you, Charles! simply excellent as always.
More informative than i ever see!
Silly question but can someone studying for CCNA just listen to your classes? Your classes are so thorough
4:15 Not exactly. All non-[B]DR routers on a Broadcast segment stay in the 2WAY/DROTHER relation with other non-[B]DR routers
Multicast, SDN ?
Hey charles can you explain why do we see one unicast hello packet after the dbd Packet no 93 time : 12:20
Our OSPF-enabled router wants to form adjacencies with all neighbors on a subnet, which is why we initially see the OSPF hello packet sent as a multicast message. The packet you mention (93) marks the point where the DR/BDR relationship is being established. There is a DR/BDR election for every individual network segment between OSPF-enabled devices. So for example, if we had R3 as an additional router connected to R1, we would need a DR/BDR election for the link between R1-R2, and also the link between R1-R3. This is the reason we see unicast messages during this phase - because only two specific nodes would be involved in the election process.
@@CharlesJudd Thankyou so much and really appreciate the explaining.
From,
Happy Subscriber.