explorer-monorepo/192.168.11.166_NOT_IN_UDM_PRO.md

192.168.11.166 Not Showing in UDM Pro

Date: 2026-01-22
Issue: 192.168.11.166 is not appearing as a client in UDM Pro

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Current UDM Pro Client Status

✅ Visible Clients

• 192.168.11.167: MAC bc:24:11:a8:c1:5d (VMID 10233, eth1)

  • Connection: UDM Pro Port 2
  • Status: Active
  • Uptime: 3d 22h 37m 33s

• 192.168.11.168: MAC bc:24:11:8d:ec:b7 (VMID 10234, eth0)

  • Connection: Not specified
  • Status: Active
  • Uptime: Jan 22 2026 1:36 PM

❌ Missing Client

• 192.168.11.166: MAC BC:24:11:18:1C:5D (VMID 10233, eth0)
  • Not visible in UDM Pro

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Analysis

Possible Reasons

1. No Traffic from 192.168.11.166

   • Interface may be configured but not actively used
   • Default route may use eth1 (192.168.11.167) instead
   • No outbound traffic from this IP

2. Interface Not Routing

   • eth0 may not be the primary interface
   • Gateway may be configured only on eth1
   • Routing table may prefer eth1

3. UDM Pro Not Seeing ARP

   • No ARP requests from 192.168.11.166
   • Interface may be passive
   • No network activity on this IP

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Investigation

Checking container configuration and routing...

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Resolution Options

Option 1: Generate Traffic from 192.168.11.166

Force traffic from this IP to make UDM Pro see it:

• Ping gateway from 192.168.11.166
• Make HTTP request from this IP
• Generate ARP traffic

Option 2: Verify Interface is Active

Ensure eth0 is actively routing traffic:

• Check default route uses eth0
• Verify gateway is reachable from eth0
• Test connectivity from this IP

Option 3: Remove Unused Interface (if not needed)

If 192.168.11.166 is not needed:

• Remove net0 interface
• Keep only net1 (192.168.11.167)

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Status: Investigation in progress...