The Multicast Manager correlates abnormal multicast conditions, or symptoms, with notifications received from the IP Availability Managerand then calculates the impact these have on objects in its repository. Through a correlation process, the Multicast Manager identifies multicast root cause problems, and reports the root cause problems as well as key symptoms to the Global Manager.
Following table lists the impact notifications generated by the Multicast Manager for each type of managed object class.
|Multicast-specific class||Impact notification||Description of notification|
|IGMPInterface||IGMPInterfaceImpacted||This IGMP interface cannot be reached due to a failure on the host. The IGMP interface is not operational due to a Layer 2 or Layer 3 failure.
Note: The IGMPInterface class is a multicast-specific class that is transparent to the user, and therefore was not described in Chapter 2. IGMPInterface is a logical interface that provides IGMP functionality.
|MulticastGroup||ImpactedByAnycast||The multicast group is impacted by failure of one or more components within the anycast redundancy group that this group is served by.|
|MulticastGroup||ImpactedByUnderlyingFailure||The multicast group is impacted by the failure of a device.|
|MulticastRedundancyGroup||Impacted||The multicast functionality of this redundancy group is impacted by a physical failure.|
|MulticastService||MulticastImpacted||The multicast functionality of this device is impacted by a physical failure.|
|MulticastService||RPImpacted||The functionality of this Rendezvous Point is impacted by a physical failure.|
|MulticastService||MulticastUpstreamImpacted||This multicast service is impacted by a problem in an upstream multicast device.|
|PIMHop||Impacted||The multicast hop is not available due to physical or logical failure.|
|PIMInterface||PIMInterfaceImpacted||The PIM interface is not operational due to a Layer 2 or Layer 3 failure.
The PIMInterface class is a multicast-specific class that is transparent to the user, and therefore was not described in Chapter 2. PIMInterface is a logical sub-interface that transmits and receives multicast packets in accordance with the PIM standard. It can be configured in either dense, sparse, or dense-sparse mode.