OLT disconnected from Cpehub

Symptom: an entire OLT stopped communicating — several of its CPEs stop updating, or the OLT's connectivity badges are red.

This is an infrastructure problem: if the OLT goes down, Cpehub loses visibility of all its CPEs at once. Treat it with priority.

Quick diagnosis

OLT not communicating

Open OLTs and check badges

Which ones are red?

SSH and SNMPContinue diagnosisAll of themContinue diagnosisTRAP onlySNMP Trap not configured on the OLT

Network/VPN to the OLT

VPN online?

NoFix the VPNYesOLT IP/credentials/firewall

Step by step

1. Go to OLTs and find the OLT. Check the connectivity badges (SSH / SNMP / TRAP).

2. Open the OLT and use the Test buttons (Console and SNMP) — see Test the OLT connection.

3. Interpret it:

   • SSH and SNMP red → Cpehub can't reach the OLT. Check the VPN tunnel (Communication (VPN)) and the IP/firewall.
   • TRAP only → the OLT isn't sending traps to Cpehub. Reconfigure SNMP Trap on the OLT (see per-manufacturer tutorials in OLTs) and see Events not appearing in real time.

4. If the VPN is offline, fix that first — without a VPN, nothing reaches the OLT.

Most common causes

Cause	Indication	Action
VPN went down	SSH+SNMP red, VPN offline	Restore the VPN
IP/credentials changed	Console Test fails	Update the OLT record
Firewall blocking	Reaches the network but not the OLT	Open the ports (SSH/SNMP)
Trap not configured	Only TRAP red	Configure SNMP Trap on the OLT

When to escalate

• VPN and network are OK, but the OLT doesn't respond → network team/NOC (could be the OLT itself).

See also

• Test the OLT connection
• Events not appearing in real time
• Communication (VPN)