The Race Conditions of Neutron L3 HA’s Scheduler Under Scale Performace

Neutron’s Router presents a L3 interface that connects VMs to an external network. In its legacy mode, a router can be scheduled only to one agent at a time, presenting a single point of failure – if that node fails, all communications are halted. L3 HA mitigates this issue by presenting an Active/Passive configuration where a router can be scheduled to multiple agents which recover the datapath automatically during failures using a dedicated network that hosts keepalived processes. Using L3 HA

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