If the command "disable-learning" has been added at the VPLS level, then MAC entries which have already been learned will not be aged.

The disable-learning command, when configured at the VPLS service level on a Nokia Service Router, only prevents the learning of new source MAC addresses. It does not affect the aging process for MAC entries that are already present in the Forwarding Database (FDB). These existing, previously learned MAC entries will continue to be subject to the configured MAC aging timer and will be removed from the FDB if they are not refreshed by subsequent traffic before the timer expires.

The statement is false because it incorrectly assumes that disabling the learning function also disables the aging function. In Nokia's SR OS, MAC learning and MAC aging are distinct processes. The disable-learning command specifically targets the population of the FDB with new entries, while the mac-aging timer independently manages the lifecycle of all dynamic entries within the FDB.

1. Nokia 7750 SR OS Services Guide, Release 21.10.R1, Document Part Number: 3HE 17680 AAAD TQZZA, Section: VPLS Configuration Commands.

In the description for the disable-learning command, the documentation clarifies its function is to stop the learning of new MAC addresses. It does not state that it stops the aging of existing entries. The mac-aging command is described separately as the mechanism that controls the removal of inactive dynamic MAC addresses. This separation of functions confirms that disabling one does not disable the other.

2. Nokia 4A0-105 Courseware: Nokia Virtual Private LAN Services, Student Guide, Module 3: VPLS Configuration and Implementation.

This module details the VPLS forwarding plane. It explains that the FDB is populated through MAC learning. It also describes the aging mechanism as a separate, continuous process that removes stale entries to maintain FDB health. The disable-learning feature is presented as a way to create a static FDB or a hub-and-spoke topology, which only affects the ingress learning process, not the maintenance (aging) of existing entries.