The Highest Priority Speaks
If several routers share one virtual IP, how does the code decide which one gets to be master?
Open Session 01Sessions
HA (VRRP+BFD) track sessions
Silence Means Failure
A VRRP backup never asks "are you alive?" — so how does it decide, correctly, that the master is gone?
Open Session 02Three States, Both Directions
BFD has to agree on "the session is up" between two independent sides — how does a three-state machine reach agreement without a central decision-maker?
Open Session 03Build the Toy Failover Loop
A real HA pair runs both a millisecond-scale detector and a seconds-scale one, watching the same failure at once — what does it actually look like when both are wired to the same pair of routers?
Open Session 04