Port Layer Alarm Suppression

Devices that support advanced network technologies, such as Frame Relay and Link Aggregation, have logical entries in the ifTable representing higher layer interfaces. sp models these logical layers according to the ifStackTable. If you set the use_if_entity_stacking (0x12a83) attribute to TRUE on a device model in the Attributes tab, sp attempts to use information from RFC2737 (Entity MIB) to model these logical layers if the ifStackTable method fails.
casp1032
Devices that support advanced network technologies, such as Frame Relay and Link Aggregation, have logical entries in the ifTable representing higher layer interfaces.
CA Spectrum
models these logical layers according to the ifStackTable. If you set the use_if_entity_stacking (0x12a83) attribute to TRUE on a device model in the Attributes tab,
CA Spectrum
attempts to use information from RFC2737 (Entity MIB) to model these logical layers if the ifStackTable method fails.
When a monitored higher layer port goes down (such as a Frame Relay DLCI, or logical trunk interface),
CA Spectrum
will query the statuses of all lower layer interfaces before alarming the port which went down. If all of the lower layer interfaces are down as well,
CA Spectrum
will suppress the higher layer interface alarm. A key example is a physical Frame Relay interface going down which has multiple circuits provisioned on it. All of the higher layer DLCI port models will be suppressed, and the single red alarm will exist on the physical Frame Relay interface.