SPs don't failover in case of networking issues. The storage processors and the storage servers continue to run where they were running, but the IO gets routed internally (through fail safe networking) to the corresponding ports on the other SP. The storage processors will fail over when there is a problem with the SP, not because of network issues.
Could you please tell me under what situations will VNXe services failover from one SP to another ? And how to test the failover?
VNXe Failover