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BGP Communities: Standard, Extended, and Large
BGP

BGP Communities: Standard, Extended, and Large

BGP communities tag routes with meaning: customer route, prefer this path, do not advertise outside our region. A complete guide to standard, extended, and large BGP communities with practical policy examples.
BGP RPKI and Route Origin Validation on IOS XE
BGP

BGP RPKI and Route Origin Validation on IOS XE

RPKI lets prefix owners sign ROAs that say which AS is authorized to originate their prefixes. Route Origin Validation rejects invalid routes. A practical guide to RPKI and ROV on Cisco IOS XE for internet-facing networks.
BGP Route Leaks and Hijacks: Detection and Prevention
BGP

BGP Route Leaks and Hijacks: Detection and Prevention

BGP was designed when every AS was trusted. Accidental route leaks and deliberate prefix hijacks have caused repeated major outages. How to detect them, prevent them, and protect your AS from the blast radius when others make mistakes.
BGP Convergence: Timers, BFD, and Reducing Failover Time
BGP

BGP Convergence: Timers, BFD, and Reducing Failover Time

Default BGP convergence can take 3 minutes to notice a dead peer. That is fine on the public internet and unacceptable in enterprise or data center BGP. Every knob for reducing BGP failover time on Cisco IOS XE, including BFD.
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