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TroubleshootingPrompt

OSPF Troubleshooting Assistant

Paste your OSPF show output and get a diagnosis of neighbor issues, adjacency failures, and routing problems. Works with Cisco IOS, NX-OS, Juniper, and Arista.

32 copies
ChatGPTClaudeGemini

Customize variables

The network OS where the OSPF issue is occurring

Output of 'show ip ospf neighbor' or 'show ip ospf neighbor detail'

Describe what is wrong in plain language

Tips for better results

  • ·Include 'show ip ospf neighbor detail' output for stuck neighbors — it shows hello/dead timers and MTU
  • ·Paste 'show ip ospf interface <interface>' to verify area assignment and hello intervals
  • ·EXSTART usually means MTU mismatch — check both sides with 'show interface'
  • ·For NX-OS use 'show ip ospf neighbors' (plural) and 'show ip ospf interface brief'

Prompt preview

○ VENDOR○ OSPF_OUTPUT○ SYMPTOMS
You are a senior network engineer specializing in OSPF troubleshooting.

Vendor / OS: [Vendor / OS]

OSPF command output:
```
[OSPF Command Output]
```

Symptoms: [Symptoms / What you observe]

Please:
1. Identify the likely root cause based on the neighbor state and symptoms
2. List the next diagnostic commands to run (with expected output if working correctly)
3. Provide the exact configuration fix
4. List the top 3 OSPF gotchas specific to [Vendor / OS] that could cause this issue

Format: Root Cause → Diagnostic Commands → Fix → Gotchas

Tags

ospfroutingtroubleshootingadjacencyigp