EIGRP Packet Types: Hello, Update, Acknowledgment, Query, and Reply Explained
EIGRP uses five different types of packets to communicate with its neighbors: Hello, Update, Acknowledgment, Query, and Reply. Depending on the packet type, EIGRP sends them with reliable or unreliable delivery, and as unicast, multicast, or sometimes both. These packet types are sometimes also referred to as EIGRP packet formats or EIGRP messages. Here’s a...
