This read-write INTEGER sets the maximum number of addresses the PPE will learn for bridging purposes, with remaining table capacity reserved for routing-related addresses. An administrator lowers it on a mixed bridge/router deployment to guarantee routing-related entries aren't starved by an overly large bridging table. For example, the admin reduces ppeBAddrLimit after noticing routing-related address entries were being crowded out by an ever-growing bridging table on a heavily populated LAN.