Day 51 — Fast External Fallover and BGP Next-Hop Tracking
1. Opening Not every BGP failure needs BFD. A directly connected eBGP peer can often be reset immediately when the interface used to reach ...
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Day 50 — BFD for BGP: Fast Failure Detection Without False Confidence
By
Haider Raza
•
1. Opening BFD is attractive because it can detect forwarding-path failure far faster than ordinary BGP timers. It is also dangerous when o...
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Day 49 — BGP Timers: Keepalive, Hold Time, ConnectRetry and SendHoldTimer
By
Haider Raza
•
1. Opening BGP's traditional liveness model is often summarized as 'keepalives every 60 seconds, dead after 180 seconds.' That ...
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Day 48 — BGP OPEN Capabilities, NOTIFICATION Errors and Session-Engineering Capstone
By
Haider Raza
•
1. Opening Once TCP succeeds, BGP still has to agree on the OPEN message and optional capabilities. Many sessions that appear almost up are...
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Day 47 — BGP Session Authentication: TCP-MD5, TCP-AO and Key-Rollover Boundaries
By
Haider Raza
•
1. Opening BGP sessions are long-lived TCP connections and attractive disruption targets. Session authentication protects the TCP exchange ...
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