- An EIGRP neighbor with IP address 10.10.10.14 is connected to R1 via serial interface 0/1/0.
- There is no incoming EIGRP message at this moment.
- The first EIGRP neighbor R1 learned about has the IP address 10.10.10.2.
- If R1 does not receive a Hello packet in 4 seconds from the neighbor with IP 10.10.10.18, it will declare the neighbor is down.
Explanation: With the show ip eigrp neighbors command, the output includes:
H column – Lists the neighbors in the order that they were learned.
Address – IPv4 address of the neighbor.
Interface – Local interface on which this Hello packet was received.
Hold – Current hold time. When a Hello packet is received, this value is reset to the maximum hold time for that interface, and then counts down to zero. If zero is reached, the neighbor is considered down.
Queue Count – Should always be zero. If more than zero, then EIGRP packets wait to be sent.
In the output shown, the neighbor router with IP 10.10.10.2 was the first neighbor learned by router R1.
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