This value is the GARP Hold Time, in units of 100ms and ranging from 1 to 3275, a ZTE-private timer controlling how long the switch buffers outgoing GARP PDUs before transmitting them together. Admins tune it to control how GARP (and by extension GVRP) messages are batched, balancing protocol responsiveness against transmission overhead. Leaving it at the default of 1 (100ms) gives fast propagation of registration events with minimal batching delay.