150+ Top EIGRP Interview Questions

Networking enthusiasts! Ready to ace that EIGRP interview? 🚀 Whether you’re a pro or just starting out, EIGRP interview questions can be a bit tricky. Here in this post, we have listed 150+ Top EIGRP Interview Questions.

Introduction

Welcome to the world of EIGRP, where networking expertise meets the art of effective communication. In this article, we’ll delve into essential EIGRP interview questions, ensuring you’re well-prepared for any networking interview that comes your way.

What is EIGRP?

EIGRP, or Enhanced Interior Gateway Routing Protocol, is a dynamic routing protocol widely used in computer networking. Unlike its counterparts, EIGRP offers advanced features and benefits that make it a preferred choice for many network administrators.

EIGRP Interview Preparation

Before jumping into the questions, it’s crucial to understand the interview format and focus on core EIGRP concepts. This preparation ensures you’re not only answering questions but showcasing a deep understanding of EIGRP.

Here is the list of 150+ Top EIGRP Interview Questions

Basic Concepts and Configuration

1. What is EIGRP?

2. Explain the difference between IGRP and EIGRP.

3. What is a feasible successor in EIGRP?

4. Describe the Diffusing Update Algorithm (DUAL) in EIGRP.

5. How does EIGRP handle unequal-cost load balancing?

6. What are the key metrics used by EIGRP for path selection?

7. Explain the concept of EIGRP autonomous system.

8. What is the administrative distance of EIGRP?

9. Describe the neighbor discovery process in EIGRP.

10. How does EIGRP handle route summarization?

11. What is the purpose of the EIGRP Router ID?

12. Explain the role of the EIGRP hello packet.

13. What is the hold time in EIGRP?

14. How is EIGRP Stub Routing used?

15. Describe EIGRP route authentication.

16. Explain the concept of EIGRP Composite Metric.

17. What is the purpose of the EIGRP stub routing feature?

18. How does EIGRP handle split horizon?

19. What is the bandwidth and delay in EIGRP metrics?

20. Explain the EIGRP Diffusing Update Algorithm (DUAL) finite state machine.

21. Describe the key differences between EIGRP and OSPF.

22. How does EIGRP prevent routing loops?

23. What is the successor route in EIGRP?

24. Explain the role of the EIGRP topology table.

25. How does EIGRP handle triggered updates?

Advanced Concepts and Troubleshooting

26. What is the purpose of the EIGRP stuck in active (SIA) mechanism?

27. Explain the concept of EIGRP variance.

28. How does EIGRP support multiple network layer protocols?

29. Describe the EIGRP Metric Calculation Formula.

30. What is the bandwidth delay product in EIGRP?

31. How does EIGRP handle unequal-cost load balancing?

32. What is the EIGRP metric K-value?

33. How does EIGRP support IP multicast traffic?

34. Explain the concept of EIGRP route redistribution.

35. What is the purpose of the EIGRP summary route?

36. Describe the EIGRP hello and hold timers.

37. How does EIGRP use Diffusing Update Algorithm (DUAL) for loop prevention?

38. Explain the role of the EIGRP Query process.

39. What is the EIGRP composite metric?

40. How does EIGRP handle bandwidth and delay in metric calculation?

41. What are the key components of the EIGRP neighbor table?

42. Explain the EIGRP stuck in active (SIA) troubleshooting process.

43. How does EIGRP use the Diffusing Update Algorithm (DUAL) to select routes?

44. Describe the EIGRP topology table entries.

45. What is the EIGRP hello interval and hold time default values?

46. How does EIGRP handle route summarization in a hub-and-spoke network?

47. Explain the role of the EIGRP successor and feasible successor.

48. Describe the EIGRP route redistribution process.

49. What is the EIGRP bandwidth and delay default values?

50. How does EIGRP handle route poisoning?

Design and Best Practices

51. What is the purpose of EIGRP authentication?

52. Explain the concept of EIGRP summarization.

53. How does EIGRP handle convergence in a network?

54. What is the significance of the EIGRP K-values?

55. Describe the EIGRP route filtering mechanisms.

56. How does EIGRP support manual summarization?

57. What is the EIGRP composite metric formula?

58. Explain the difference between EIGRP classic and named mode.

59. How does EIGRP support VLSM (Variable Length Subnet Masking)?

60. What is the purpose of EIGRP Stub Routing?

61. Describe the EIGRP bandwidth and delay components.

62. How does EIGRP handle neighbor discovery in a network?

63. What are the advantages of using EIGRP over other routing protocols?

64. Explain the concept of EIGRP variance and its use in load balancing.

65. What is the purpose of the EIGRP hold time?

66. How does EIGRP calculate the metric for a route?

67. Describe the EIGRP manual summarization process.

68. How does EIGRP support route filtering and distribution lists?

69. Explain the concept of EIGRP stub routers and their benefits.

70. What is the significance of the EIGRP autonomous system number?

71. Describe the EIGRP stuck in active (SIA) troubleshooting steps.

72. How does EIGRP handle route summarization in a hierarchical network?

73. What is the EIGRP composite metric weight?

74. Explain the role of the EIGRP metric in path selection.

75. How does EIGRP prevent routing loops in a network?

76. Describe the process of EIGRP metric calculation.

77. What are the key characteristics of EIGRP route redistribution?

78. How does EIGRP support manual route summarization?

79. Explain the concept of EIGRP convergence.

80. What is the role of EIGRP K-values in metric calculation?

Troubleshooting and Scenarios

81. How do you troubleshoot EIGRP neighborship issues?

82. What are common reasons for EIGRP routes being stuck in active?

83. Explain the process of troubleshooting EIGRP route flapping.

84. How does EIGRP handle link failures and network convergence?

85. What steps would you take to troubleshoot EIGRP route instability?

86. Describe the EIGRP stuck in active (SIA) recovery process.

87. How can you identify and resolve EIGRP split horizon issues?

88. What are the common causes of EIGRP route summarization problems?

89. Explain the steps to troubleshoot EIGRP route authentication issues.

90. How do you troubleshoot EIGRP route redistribution problems?

91. What is the impact of EIGRP metric changes on route selection?

92. Describe the troubleshooting steps for EIGRP route filtering issues.

93. How can you detect and resolve EIGRP route loop issues?

94. Explain the steps to troubleshoot EIGRP manual summarization problems.

95. What are the common symptoms of EIGRP routing loop issues?

96. How does EIGRP handle suboptimal routing scenarios?

97. Describe the troubleshooting steps for EIGRP hello and hold time issues.

98. How do you troubleshoot EIGRP composite metric calculation problems?

99. What are the common challenges in troubleshooting EIGRP route redistribution?

100. Explain the steps to troubleshoot EIGRP convergence delays.