This read-only counter tracks the number of packets discarded at this port because the bridge lacked buffer space to hold them. An admin treats a rising bdgPortDisLOB count as a sign of the bridge being overwhelmed by traffic bursts on that port, potentially indicating a need to reduce load or investigate a traffic storm. For example, a sudden spike in bdgPortDisLOB coinciding with a broadcast storm on the attached segment would point the admin toward buffer exhaustion as the cause of dropped frames.