show ip eigrp interfaces
Displays detailed information about interfaces on which EIGRP is enabled, including neighbor status, pending routes, and interface statistics, used to verify EIGRP adjacency and interface participation.
show ip eigrp interfacesWhen to Use This Command
- Verify which interfaces are participating in EIGRP and check for any passive interfaces that should be active.
- Troubleshoot EIGRP neighbor adjacency issues by checking interface status and hello/hold timers.
- Monitor EIGRP traffic statistics on an interface to detect excessive packet loss or retransmissions.
- Confirm that EIGRP is enabled on the correct interfaces after configuration changes.
Command Examples
Basic show ip eigrp interfaces
show ip eigrp interfacesEIGRP interfaces for process 100
Xmit Queue Mean Pacing Time Multicast Pending
Interface Peers Un/Reliable SRTT Un/Reliable Flow Timer Routes
Gi0/0 1 0/0 12 0/10 50 0
Gi0/1 0 0/0 0 0/10 50 0
Se0/0/0 1 0/0 25 0/10 100 0Interface: The router interface name. Peers: Number of EIGRP neighbors on that interface. Xmit Queue Un/Reliable: Number of packets waiting in the unreliable/reliable transmit queue (should be low). Mean SRTT: Smooth Round Trip Time in milliseconds (lower is better). Pacing Time Un/Reliable: Time between packet transmissions for unreliable/reliable packets. Multicast Flow Timer: Time in milliseconds to wait before sending multicast packets. Pending Routes: Number of routes waiting to be sent to neighbors (should be 0 in steady state).
Show ip eigrp interfaces detail
show ip eigrp interfaces detailEIGRP interfaces for process 100 Interface: GigabitEthernet0/0 Mtu: 1500 Bandwidth: 1000000 Kbit Delay: 10 usec Reliability: 255/255 Load: 1/255 Nbrs: 1 Hello: 5 sec Hold: 15 sec Xmit Queue Un/Reliable: 0/0 Mean SRTT: 12 ms Pacing Time Un/Reliable: 0/10 ms Multicast Flow Timer: 50 ms Pending Routes: 0 Interface: GigabitEthernet0/1 Mtu: 1500 Bandwidth: 100000 Kbit Delay: 100 usec Reliability: 255/255 Load: 128/255 Nbrs: 0 Hello: 5 sec Hold: 15 sec Xmit Queue Un/Reliable: 0/0 Mean SRTT: 0 ms Pacing Time Un/Reliable: 0/10 ms Multicast Flow Timer: 50 ms Pending Routes: 0
This detail output adds interface bandwidth, delay, reliability, load, MTU, and hello/hold timers. Bandwidth and delay are used for metric calculation. Reliability and load are dynamic values (255/255 is best). Hello and Hold timers must match between neighbors. High load (e.g., 128/255) may indicate congestion. No neighbors on Gi0/1 suggests a problem if adjacency is expected.
Understanding the Output
The 'show ip eigrp interfaces' command output lists each interface running EIGRP. Key columns: Interface (name), Peers (number of established neighbors; 0 means no adjacency), Xmit Queue Un/Reliable (should be low; high values indicate congestion or slow neighbor), Mean SRTT (smooth round-trip time; high values suggest slow link), Pacing Time (time between packet sends; default values are normal), Multicast Flow Timer (time to wait before sending multicast; default is fine), Pending Routes (should be 0; non-zero means routes are being exchanged). In the detail view, Bandwidth and Delay are used for metric calculation; lower delay and higher bandwidth yield better metric. Reliability (255/255 is perfect) and Load (1/255 is low) indicate link quality. Hello and Hold timers must match between neighbors. Watch for interfaces with 0 peers if adjacency is expected, or high pending routes indicating convergence issues.
CCNA Exam Tips
CCNA exam tip: The 'show ip eigrp interfaces' command does not show the EIGRP router ID; use 'show ip eigrp topology' or 'show ip protocols' for that.
CCNA exam tip: If an interface shows 0 peers but EIGRP is configured, check for passive-interface configuration or mismatched AS numbers.
CCNA exam tip: The 'Pending Routes' field should be 0 in a stable network; non-zero indicates routes are still being exchanged or there is a problem.
CCNA exam tip: Remember that EIGRP uses multicast address 224.0.0.10; if the interface is not receiving hellos, check ACLs or switchport settings.
Common Mistakes
Mistake 1: Assuming 'show ip eigrp interfaces' shows all interfaces on the router; it only shows interfaces with EIGRP enabled.
Mistake 2: Confusing 'Pending Routes' with routes in the routing table; pending routes are those not yet sent to neighbors.
Mistake 3: Forgetting that the detail output includes metric components (bandwidth, delay) which are used for route selection; misinterpreting these values can lead to incorrect troubleshooting.
Related Commands
show ip eigrp neighbors
Displays the neighbor table for EIGRP, showing all directly connected EIGRP routers and their status, used to verify EIGRP adjacencies and troubleshoot neighbor relationships.
show ip eigrp topology
Displays the EIGRP topology table, showing all learned routes and their feasible successors, used to verify EIGRP convergence and path selection.
show ip protocols
Displays the current state of all IP routing protocols running on the router, including timers, filters, and network advertisements.
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