BGP
Day 6 — BGP Message Types: OPEN, UPDATE, KEEPALIVE, NOTIFICATION and ROUTE-REFRESH
Learning objective Identify the purpose of each major BGP message, relate messages to the FSM and routing lifecycle, and use counters/captu...
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BGP
Day 5 — BGP Finite-State Machine: States, Transitions and Session Troubleshooting
Learning objective Use the BGP finite-state machine as a troubleshooting model: identify what a current state proves, what it does not prov...
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BGP
Day 4 — BGP Transport Mechanics: TCP/179, Reachability, Update-Source and eBGP Multihop
Learning objective Build and troubleshoot a BGP session whose peer addresses are loopbacks, explaining the separate roles of IP reachabilit...
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BGP
Day 3 — eBGP vs iBGP: Session Roles, Propagation Rules and Forwarding Implications
Learning objective Explain how eBGP and iBGP serve different roles, predict how routes propagate between them, and diagnose the classic cas...
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BGP
Day 2 — Autonomous System Numbers: 2-Byte, 4-Byte, Private Space and Operational Ownership
Learning objective Distinguish public and private ASNs, understand 2-byte and 4-byte ASN operation and notation, and configure a safe lab u...
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BGP
Reticux Day 1 — Why BGP Exists: Interdomain Routing, Policy and Autonomous Systems
Learning objective By the end of this post, the reader should be able to explain why BGP is required between independently administered rou...
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