Pause4Tech - EIGRP Module A: Verification Checklist (Part 2 of 5)

✅ Verification Checklist

Compare your CLI output with expected healthy states and failure indicators

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📌 How to Use This Checklist

Run each command on your router. Compare your output with the "Expected Output (Healthy)" column. If you see anything matching the "Failure Indicator" column, refer to the Troubleshooting Vault (Part 3) for the fix.

Command Expected Output (Healthy) Failure Indicator

Command	Expected Output (Healthy)	Failure Indicator
`show ip eigrp neighbors`	H Address Interface Hold Uptime SRTT RTO Q Seq 0 10.1.12.2 Gi0/0 13 00:10:23 12 200 0 45 1 10.1.13.2 Gi0/1 11 00:09:15 8 200 0 32 ✅ Hold > 0, Q=0, Uptime increasing	H Address Interface Hold Uptime SRTT RTO Q Seq 0 10.1.12.2 Gi0/0 0 00:10:23 12 200 5 45 ❌ Hold=0 → neighbor expired; Q>0 → pending acks
`show ip eigrp traffic`	Hellos (sent/received): 1234/1230 Updates (sent/received): 45/42 Queries (sent/received): 2/1 Replies (sent/received): 1/2 Acks (sent/received): 87/90 ✅ Low query count; balanced sent/received	Queries (sent/received): 15/20 ❌ Excessive queries indicate flapping links or missing FS
`show ip protocols`	Routing Protocol is "eigrp 1234" K-values: K1=1, K2=0, K3=1, K4=0, K5=0 EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0 ✅ K-values match default; all neighbors use same values	K-values do not match neighbour's → adjacency will not form ❌ K-value mismatch breaks neighbor relationships
`show ip eigrp interfaces`	EIGRP-IPv4 Interfaces for AS(1234) Interface Peers Un/Reliable SRTT Un/Reliable Flow Timer Routes Gi0/0 1 0/0 12 0/0 50 0 Gi0/1 0 0/0 0 0/0 0 0 ✅ Peers > 0 on active interfaces	Interface Peers Un/Reliable SRTT Un/Reliable Flow Timer Routes Gi0/0 0 0/0 0 0/0 0 0 ❌ No peers on interface that should have neighbors

show ip eigrp neighbors

H   Address         Interface  Hold  Uptime   SRTT   RTO  Q  Seq
0   10.1.12.2       Gi0/0       13    00:10:23  12     200   0  45
1   10.1.13.2       Gi0/1       11    00:09:15  8      200   0  32

✅ Hold > 0, Q=0, Uptime increasing

H   Address         Interface  Hold  Uptime   SRTT   RTO  Q  Seq
0   10.1.12.2       Gi0/0       0     00:10:23  12     200   5  45

❌ Hold=0 → neighbor expired; Q>0 → pending acks

show ip eigrp traffic

Hellos (sent/received): 1234/1230
Updates (sent/received): 45/42
Queries (sent/received): 2/1
Replies (sent/received): 1/2
Acks (sent/received): 87/90

✅ Low query count; balanced sent/received

Queries (sent/received): 15/20

❌ Excessive queries indicate flapping links or missing FS

show ip protocols

Routing Protocol is "eigrp 1234"
  K-values: K1=1, K2=0, K3=1, K4=0, K5=0
  EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0

✅ K-values match default; all neighbors use same values

K-values do not match neighbour's → adjacency will not form

❌ K-value mismatch breaks neighbor relationships

show ip eigrp interfaces

EIGRP-IPv4 Interfaces for AS(1234)
Interface        Peers  Un/Reliable  SRTT   Un/Reliable   Flow Timer   Routes
Gi0/0              1       0/0        12       0/0          50           0
Gi0/1              0       0/0        0        0/0          0            0

✅ Peers > 0 on active interfaces

Interface        Peers  Un/Reliable  SRTT   Un/Reliable   Flow Timer   Routes
Gi0/0              0       0/0        0        0/0          0            0

❌ No peers on interface that should have neighbors

🛠️ Production CLI Blueprint

Hardened Configuration for EIGRP Deployment

Reference

📌 How to Use This Blueprint

Copy these commands into your production or lab routers. Replace 1234 with your AS number and update interface names to match your topology. The blueprint includes best practices like disabling auto-summary and using passive-interface default.

Global EIGRP Process

router eigrp 1234
 network 10.0.0.0 0.255.255.255
 no auto-summary
 passive-interface default
 no passive-interface GigabitEthernet0/0
 metric weights 0 1 0 1 0 0

Interface Tuning (Per Neighbor)

interface GigabitEthernet0/0
 ip hello-interval eigrp 1234 5
 ip hold-time eigrp 1234 15
 ip authentication mode eigrp 1234 md5
 ip authentication key-chain eigrp 1234 EIGRP-KEY

Key-chain for MD5 Authentication

key chain EIGRP-KEY
 key 1
 key-string SecureEigrp123!

Static Neighborship Configuration

router eigrp 1234
 neighbor 10.1.12.2 GigabitEthernet0/0

Verification Checklist & Production CLI Blueprint