Perle Systems IOLINK-520 manual Filled Address Table, Aging Exception

Introduction

Aging Exception

“Permanent” address entries are an exception to the aging rule. A permanent address is one that is not subject to the aging timer and will remain in the filter table for an indefinite period of time.

A table is reserved for permanent address entries, separate from the table that is used for those non-permanent entries that are subject to aging. These tables may be displayed and modified with the bridge/router options discussed in this manual. Access is made locally from each Bridge/Router Console or one bridge/router can be made Master, able to control all functions of a partner IOLINK router.

Filled Address Table

The filter table can hold 2048 address entries.If filter address table becomes filled, the following automatic procedure is followed:

This procedure defines that an address that is not in the table will not be added and will be treated as any other unknown address. The frame will be passed to the other segment. An alarm will also be generated with the message “Station Address Table Full,” and from this point, another alarm will be generated only if in the meantime the table empties by 1/3 and then fills up again.

IOLINK-PRO & 520 Reference Manua — 1.15