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26/02/2026
18/02/2026

πŸ› οΈ Network Topology Troubleshooting | OSPF Multi-Area Lab

Troubleshooting becomes easier when you understand the full topology! πŸ”

This lab scenario demonstrates a multi-area OSPF design with:

🌐 Area 0 (Backbone Area)
πŸ”Ή Core routers connecting to ISP
πŸ”Ή Inter-area communication
πŸ”Ή Backbone stability

🏒 Area 1 & Area 2
πŸ”Ή Access & distribution layers
πŸ”Ή End-user subnets
πŸ”Ή Route summarization
β€’ Area 1 β†’ 10.1.0.0 /16
β€’ Area 2 β†’ 10.2.0.0 /16

πŸ“Œ Key Troubleshooting Focus Areas:
βœ… OSPF neighbor relationships
βœ… Interface IP mismatches
βœ… Area mismatches
βœ… Route summarization issues
βœ… Connectivity to ISP / Internet test address

Perfect practice scenario for CCNA, CCNP, and OSPF troubleshooting preparation.

Save this topology and test yourself:
β€’ Can all areas reach Area 0?
β€’ Are summary routes working correctly?
β€’ Is external connectivity reachable?

12/02/2026
08/02/2026
08/02/2026
08/02/2026
πŸ’”πŸ™‚
30/06/2025

πŸ’”πŸ™‚

30/06/2025
Us ❀️‍πŸ”₯
23/06/2025

Us ❀️‍πŸ”₯

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