The value of the object tFilterEmbedFlowspecRtrId specifies a virtual router for which a set of flowspec rules have been configured by an external system. Such flowspec rules will be embedded into the embedding filter specified by tFilterEmbedFlowspecFilterType and tFilterEmbedFlowspecInsertFltrId. At the time of creation of a row via SNMP you can either specify or not specify a value for tFilterEmbedFlowspecRtrId. If you do not specify the value of tFilterEmbedFlowspecRtrId then the system will try to obtain it. This corresponds to the situation when the embedding filter has already been assigned to any endpoint. If you do not specify the value of tFilterEmbedFlowspecRtrId and the embedding filter has not been assigned to any endpoint yet then the creation of the row will fail. If you specify the value of tFilterEmbedFlowspecRtrId then the system will check if the embedding filter has already been assigned to any endpoint. If this is not the case it will not be possible to assign the embedding filter outside the scope of the virtual router specified by tFilterEmbedFlowspecRtrId. If this is the case then the creation of the row may be successful only if the value of the virtual router specified by tFilterEmbedFlowspecRtrId matches with the value already stored in the system. In any case the value of tFilterEmbedFlowspecRtrId cannot be changed after creation of the row.