Components and indicators

Monitoring coverage

Quantitative review by category

Category	Number of metrics	Survey interval	Key indicators
Config	2	10 sec	Configuration status, reload counter
Network	1	10 sec	Node connection status (PGW/AAA/HSS)
IKEv2 (SWu)	3	10 sec	Reports by type (IKE_SA_INIT, IKE_AUTH, CREATE_CHILD_SA), delay diagram, errors
GTPv2-C (S2b)	4	10 sec	Messages (Create/Modify/Delete Session), delays, errors, relays
GTP-U data plane	3	10 sec	Packets/bytes, tunneling errors
Diameter (SWm/SWx/S6b)	5	10 sec	Command code messages (DER/DEA, MAR/MAA, AAR/AAA), delays, errors, watchdog, connection status
Service KPI	4	10 sec	Percentage of successful attempts, duration histogram, service availability, uptime
Session State	4	10 sec	IKE SA, Child SA, GTP sessions, all users
Application	3	10 sec	Number of streams, memory, log messages by levels
System	4	10 sec	CPU recycling, memory, memory disposal, open FD
Total	33 metrics

Naming principles

All metrics have the prefix epdg_ and are organized in a hierarchy:

epdg_
├── config_* # Configuration
├── network_* # Network layer
├── ikev2_* # SWu (IKEv2/IPSec)
├── gtp_* # S2b control-plane GTPv2-C
├── gtpu_* # S2b data-plane GTP-U
├── diameter_* # SWm/SWx/S6b
├── service_* # Service KPIs (attach, availability, uptime)
├── session_* # Session Status (IKE SA, Child SA, GTP, subscribers)
├── app_* # App Metrics (memory, threads, logs)
└── system_* # System metrics (CPU, disk, network)