In some examples, a non-transitory machine-readable storage medium having stored thereon machine-readable instructions to cause a computing processor to track a Layer 2 (L2) bit indicating a L2 connectedness between a first user anchor controller (UAC) corresponding to a client device and a second UAC acting as a standby UAC for the first UAC in a controller cluster, and reassign a third UAC to be the standby UAC for the first UAC in response to the L2 bit indicating that the first UAC is not connected to the second UAC in the same L2 network, wherein the first UAC is in the same L2 network as the third UAC.