BGP
Day 53 — BGP NSR and Stateful Switchover: Preserving Control-Plane State
1. Opening Graceful Restart and Nonstop Routing are often grouped together under 'high availability,' but they solve the switchover...
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BGP
Day 52 — BGP Graceful Restart: Capability, Stale Routes and End-of-RIB
1. Opening Graceful Restart asks a neighboring router to keep forwarding on routes learned from a restarting BGP speaker while that speaker...
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BGP
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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Stream of Knowledge
BGP
Day 50 — BFD for BGP: Fast Failure Detection Without False Confidence
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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Stream of Knowledge
BGP
Day 49 — BGP Timers: Keepalive, Hold Time, ConnectRetry and SendHoldTimer
1. Opening BGP's traditional liveness model is often summarized as 'keepalives every 60 seconds, dead after 180 seconds.' That ...
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