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- Create Date October 6, 2026
- Last Updated October 12, 2026
BGP Cheat Sheet
This BGP Cheat Sheet is designed as a fast, practical reference for network engineers, technicians, students, and anyone working with Border Gateway Protocol. It brings the most commonly needed BGP information onto a single page, including message types, the BGP finite state machine, important path attributes, best-path selection basics, common timers, eBGP versus iBGP behavior, session requirements, Cisco show commands, and BGP table codes. It also highlights troubleshooting points that frequently cause confusion, such as the meaning of the Active state, next-hop reachability, TCP port 179, TTL, and route-policy issues.
BGP can become complicated quickly, especially when you are trying to remember how attributes such as LOCAL_PREF, AS_PATH, MED, and NEXT_HOP affect route selection. This cheat sheet is intended to give you a concise reference you can keep beside your lab system, use during certification study, or consult while troubleshooting a live BGP session. Download it, print it, and keep it handy when you need a quick reminder of how BGP sessions form, how routes are evaluated, and where to start when a peer is not behaving as expected.
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