This read-write integer sets the size in bytes of each data buffer, ranging from 1 to 65535 bytes with a default of 292; the practical maximum depends on installed DRAM and software initialization requirements. Admins adjust this to size buffers appropriately for the traffic or protocol payloads the system handles. For example, an admin might increase this from the default 292 bytes to better accommodate larger packet payloads without fragmentation across multiple buffers.