EIGRP neighbors and topology Flashcards
What command shows the EIGRP neighbor table?
show ip eigrp neighbors
What does the ‘H (Handle)’ field indicate in the EIGRP neighbor table?
The order in which the neighbor adjacency was established (starting at 0).
What is the ‘Hold’ timer in the EIGRP neighbor table?
The number of seconds before a neighbor is considered unreachable (default: 15 sec).
What does ‘Uptime’ represent in the neighbor table?
How long the neighbor has been up.
What is ‘SRTT’ (Smooth Round-Trip Time)?
The time (in ms) to send an EIGRP packet and receive an acknowledgment.
What does ‘RTO’ (Retransmission Timeout) mean?
The time (in ms) EIGRP waits before retransmitting a packet.
What does ‘Q Cnt’ (Queue Count) indicate?
The number of EIGRP packets waiting to be sent (should ideally be 0).
What does ‘Seq Num’ (Sequence Number) represent?
The last update, query, or reply packet sequence received from a neighbor.
What command displays the EIGRP topology table?
show ip eigrp topology
What does ‘P’ (Passive) in the topology table indicate?
The route is stable, and there are no topology changes.
What does ‘A’ (Active) mean in the topology table?
EIGRP lost a route and is searching for an alternative path.
What does ‘Sia Status’ (Stuck in Active) indicate?
EIGRP did not receive a reply to a query in time, and the neighbor is dropped.
What is the ‘Successor’ in the topology table?
The best path to reach a destination.
What is a ‘Feasible Successor’?
A backup path that meets feasibility conditions.
What is ‘Feasible Distance’ (FD)?
The total metric cost to reach a destination.
What is ‘Advertised Distance’ (AD)?
The metric reported by a neighbor for reaching a destination.
How does EIGRP choose the best path?
The path with the lowest feasible distance (FD).
What does the ‘via’ field indicate in the topology table?
The next-hop IP address and interface to reach a network.
Why is the EIGRP topology table important?
It helps troubleshoot missing routes and configure unequal-cost load balancing.
