<mermaid> flowchart LR

  CORE["VAS Experts<br/>ePDG Monitoring"]

  CORE --> P["Prometheus<br/>CNCF / OpenMetrics"]
  CORE --> S["SNMP v2c<br/>EPDG-MIB"]
  CORE --> G["Grafana<br/>JSON Provisioning"]
  CORE --> W["Webhooks<br/>ChatOps"]
  CORE --> AM["Alertmanager<br/>Routing"]

  P --> P1["Cloud-native NMS<br/>Thanos / Cortex / Mimir"]
  S --> S1["Legacy NMS<br/>HP OpenView, NetAct<br/>IBM Tivoli"]
  G --> G1["NOC Wall Displays<br/>Drill-down Analytics"]
  W --> W1["Telegram / Slack<br/>PagerDuty / OpsGenie"]
  AM --> AM1["Smart routing<br/>Severity-based"]

</mermaid>

The native /metrics endpoint on port 9817 is built into fast-epdg. The format is standard text format Prometheus v0.0.4 (compatible with OpenMetrics). Aggregation is supported with the central Prometheus operator; remote_write team support for long-term storage in Thanos, Cortex, Grafana Mimir.

47 OID covers the Prometheus metric + 14 trap notifications (with raise/clear pairs according to RFC 3877 ALARM-MIB). Compatible with HP OpenView, IBM Tivoli NetCool, Nokia NetAct, Huawei U2000.

<mermaid> flowchart TB

  IANA["IANA PEN<br/>enterprises<br/>.1.3.6.1.4.1"]
  VAS["VAS Experts<br/>.1.3.6.1.4.1.43823<br/>(vas.expert)"]
  EPDG["EPDG-MIB<br/>.43823.1"]
  EPC["EPC Monitoring<br/>.43823.100"]

  IANA --> VAS
  VAS --> EPDG
  VAS --> EPC

  EPDG --> OBJ["epdgObjects<br/>.43823.1.1"]
  EPDG --> NOTIF["epdgNotifications<br/>.43823.1.2<br/>14 trap types"]
  EPDG --> CONF["epdgConformance<br/>.43823.1.3"]

  OBJ --> SERVICE["service .1.1.1<br/>4 OID"]
  OBJ --> IKE["ikev2 .1.1.2<br/>6 OID"]
  OBJ --> GTP["gtp .1.1.3<br/>8 OID"]
  OBJ --> DIAM["diameter .1.1.4<br/>7 OID"]
  OBJ --> SESS["sessions .1.1.5<br/>8 OID"]
  OBJ --> SYS["system .1.1.6<br/>8 OID"]
  OBJ --> NET["network .1.1.7<br/>6 OID"]

  NOTIF --> TRAPAGR["7 raise / 7 clear<br/>pairs"]

</mermaid>

Examples of SNMP requests:

# The entire ePDG tree
snmpwalk -v2c -c public <host>.1.3.6.1.4.1.43823.1
 
# Service availability (Gauge 0..1)
snmpget -v2c -c public <host> .1.3.6.1.4.1.43823.1.1.0

4 JSON dashboard support (35+ panels total):

• ePDG Overview — availability, KPI connections, sessions, state of interfaces
• IKEv2 Details — Messages, Performance, Errors, IKE SA Lifecycle
• GTP Details — GTPv2-C + GTP-U data on PGW nodes
• Diameter Details — Application messages, delays, watchdog

Automatic installation through an API that supports Grafana. Adaptive design for Network Control Center (NOC) status monitors with auto-update every 15 seconds.

Webhook interface for integration with any notification system: Telegram Bot, Slack, PagerDuty Events API v2, OpsGenie, Microsoft Teams. A separate SNMP Trap Sender service converts Alertmanager webhooks to SNMP v2c traps with Enterprise OID.