# 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

---

## 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**

---

## 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

---

## Investigation

Checking container configuration and routing...

---

## 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)

---

**Status**: Investigation in progress...