A read-write integer, in seconds, setting how long a VLAN stays disabled on a port after VLAN-based loopback detection blocks it, with a default of 0 meaning it stays disabled indefinitely until manually cleared. This controls whether the switch automatically restores a blocked VLAN after the physical loop is presumably fixed, or requires manual intervention, which affects how quickly service is restored versus the risk of re-enabling a still-looped VLAN. An admin might set this to 300 seconds so a VLAN blocked due to a detected loop automatically re-enables five minutes later, giving time for the loop to be physically corrected.