Topology

The Server Manager builds a topology of the deployed vEPC components. The topology objects represent the vEPC deployed components, their relationships, and their association with the virtual infrastructure.

vEPC topology objects include:

• EvolvedPacketCoreSubSystem: Represents the entire the vEPC solution, and comprises of three major services:
  • ControlServiceFunctions: A Content Services Module VM instance running core content service functionality, including control/subscriber management processes and infrastructure tasks(statistics collection, alarms, events, and so on).
  • ManagementControlFunctions: A Management Configuration Module VM instance running core processes, including node and configuration functions.
  • SubscriberServiceFunctions: A Subscriber Services Module VM instance running Datapath processes and supporting infrastructure services. Responsible for receiving and transmitting packets to and from MCC, Logical IP interface termination, IPSEC, Subscriber, and APN tunnel termination processes and supporting infrastructure services
• ControlServiceFunctionsGroup: Represents of multiple ControlServiceFunctions running in Redundancy mode.
• SubscriberServiceFunctionsGroup: Representation of multiple SubscriberServiceFunctions running in Redundancy mode.
• ControlServiceFunctions: Represents three major Control Services:
  • PacketDataNetworkGatewayFunction: The PacketDataNetworkGateway (PDN-GW) is responsible for connecting mobile users to the outside world. It handles the IP address allocation for UE and accounting for inter-operator charging and QoS policy enforcement and the downlink IP packets filtering into bearers and other functions.
  • ServingGatewayFunction: ServingGatewayFunction (S-GW) connects the eNB to the P-GW. It acts as local mobility anchor for the UE handover. It monitors traffic for charging purpose and do the lawful interception.
  • vEPCNetworkFunction: The vEPCNetworkFunction is a generic class to represent various network functions of the virtual Evolved Packet Core domain. Its components can be Connectivity protocols.
• ManagementControlFunction and SubscriberServiceFunctions consists of one major function:
  • vEPCNetworkFunction: The vEPCNetworkFunction is a generic class to represent various network functions of the virtual Evolved Packet Core domain. Its components can be Connectivity protocols.

Topology Objects

Topology objects provide information on specific classes, attributes, relationships, and events related to vEPC.

Table 1.

Class	Key Attributes	Key Relationship	Problem and Events
ControlServiceFunctions	IsServiceAffected IsManaged StatusIsDown	HostedBY::Host PartOf::EvolvedPacketCoreSubSystem vHostedBy::VirtualMachine Composedof::PacketDataNetworkGatewayFunction ServingGatewayFunction vEPCNetworkFunction	Service Affected
ControlServiceFunctionsGroup	IsManaged IsAllComponentsDown IsEveryComponentDown IsGroupPartOfSingleUnresponsiveSystem NumberOfComponents	ComposedOf ::ControlServiceFunctions	AllComponnetsDown AtRisk ReducedREdundancy
EvolvedPacketCoreSubSystem	Type Vendor Version IsServiceAffected IsManaged StatusIsDown	ComposedOf ::ControlServiceFunctions ComposedOf ::ManagementControlFunctions ComposedOf ::SubscriberServiceFunctions ComposedOf::MobilityManagementEntityFunction PartOf:: EvolvedPacketCoreSubSystem vHostedBy::VirtualMachine	Service Affected
ManagementControlFunctions	IsServiceAffected IsManaged StatusIsDown PartOfHavingProblems	part of ::EvolvedPacketCoreSubSystem ManagementControlFunctionsGroup vHostedBy::VirtualMachine ComposedOf::vEPCNetworkFunction HostedBy ::Host	Service Affected
ManagementControlFunctionsGroup	IsManaged IsAllComponentsDown IsEveryComponentDown IsGroupPartOfSingleUnresponsiveSystem NumberOfComponents	ComposedOf ::ManagementControlFunctions	AllComponnetsDown AtRisk ReducedREdundancy
PacketDataNetworkGatewayFunction	IsServiceAffected IsManaged StatusIsDown PartOfHavingProblems	PartOf ::ControlServiceFunctions HostedBy ::Host	ServiceAffected VNFDown
ServingGatewayFunction	IsServiceAffected IsManaged StatusIsDown PartOfHavingProblems	PartOf ::ControlServiceFunctions HostedBy ::Host	ServiceAffected VNFDown
SubscriberServiceFunctions	IsServiceAffected IsManaged StatusIsDown PartOfHavingProblems	PartOf ::EvolvedPacketCoreSubSystem vHostedBy ::VirtualMachine ComposedOf ::vEPCNetworkFunction HostedBy ::Host	Service Affected
SubscriberServiceFunctionsGroup	IsManaged IsAllComponentsDown IsEveryComponentDown IsGroupPartOfSingleUnresponsiveSystem NumberOfComponents	ComposedOf :: SubscriberServiceFunctions	AllComponnetsDown AtRisk ReducedREdundancy
vEPCNetworkFunction	Type Vendor Version IsServiceAffected IsManaged StatusIsDown	vHostedBy ::Host Part of ::ControlServiceFunctions	ServiceAffected VNFDown
MobilityManagementEntityFunction	Type Vendor Version IsServiceAffected IsManaged StatusIsDown	vHostedBy ::Host Part of ::ControlServiceFunctions	ServiceAffected VNFDown
VirtualMachine	VMIPAddress IsVMPOweredDown	vHosts ::ControlServiceFunctions vHosts ::ManagementControlFunctions vHosts ::SubscriberServiceFunctions vHosts ::MobilityManagementEntityFunction	PoweredOff DOWN
Host	IsUnResponsive SNMPAddress Model	HostsServices ::ControlServiceFunctions ManagementControlFunctions PacketDataNetworkGatewayFunction ServingGatewayFunction SubscriberServiceFunctions vEPCNetworkFunction SNMPAgent VirtualizedByVM ::VirtualizedByVM HostsAccessPoints ::IP	DOWN