The tFilterEmbedFlowspecOperStateChg notification is generated when the operational state of a set of flowspec rules embedded in an IP or IPv6 filter with scope other than 'embedded' has changed. [CAUSE] This notification may be triggered for the following reasons: 1) An attempt to embed a set of flowspec rules into an embedding filter was done. 2) An attempt to recover a flowspec rules embedding that is operationally down was done. 3) An attempt to change the admin state of a flowspec rules embedding was done. 4) The operational state of a flowspec rules embedding has changed to inactive due to lack of resources. [EFFECT] The effect depends on the new state. If the new state is 'active', the embedding of a set of flowspec rules was successful. If the new state is 'embedFailedNoResources' the embedding was not successful due to lack of resources. If the new state is 'inactive' and the previous state was 'active' then the set of flowspec rules were removed. Otherwise the embedding filter was not changed. [RECOVERY] If the new state is 'active' or 'inactive', no action is required. If the new state is 'embedFailedNoResources', an attempt to recover the operational state can be done by removal and reapplication of the flowspec rules embedding.