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Adjacencies

1.4.a Adjacencies

11. January 2022

OSPF discovers and maintains neighbor relationships by using Hello packets.  These are sent at regular intervals on interfaces participating in the OSPF routing process. Hello packets are sent to the multicast address 224.0.0.5 (IPv6 FF02::5).  The two timers used are: Hello interval: this defines how often we send the hello packet. Dead interval:  this defines… read more »

1.3.a Adjacencies

7. January 2022

EIGRP’s operations can be conceptually simplified into three basic steps: Step 1. Neighbor Discovery: Through the exchange of Hello messages, EIGRP-speaking routers discover one another, compare parameters (for example, autonomous system numbers, K-values, and network addresses), and determine if they should form a neighborship. Step 2. Topology Exchange: If neighboring EIGRP routers decide to form… read more »

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