# IP Conflict Analysis: 192.168.11.14

**Date**: 2026-01-05  
**Status**: 🔍 **DEEP INVESTIGATION REQUIRED**

---

## Current Situation

### Confirmed Facts

1. **r630-04 Physical Server**:
   - ✅ Powered OFF (confirmed)
   - ✅ Runs Debian/Proxmox (confirmed)
   - ✅ Should use IP 192.168.11.14 (assigned)

2. **Device Using 192.168.11.14**:
   - ✅ MAC: `bc:24:11:ee:a6:ec` (Proxmox-generated)
   - ✅ OS: Ubuntu (not Debian/Proxmox)
   - ✅ Responds to ping and SSH
   - ❌ NOT found in any cluster containers
   - ❌ NOT found in any cluster VMs

### Mystery

**How can a device respond if r630-04 is powered off?**

Possible explanations:
1. **Container on Different Host**: Container exists but not visible in cluster
2. **Network Device**: Switch/router interface using this IP
3. **MAC Spoofing**: Another device spoofing the MAC
4. **Cached ARP**: Old ARP entry (unlikely - device responds actively)
5. **Container on r630-04**: Container was on r630-04, but server is off (contradicts active response)

---

## Investigation Results

### Container Search
- ✅ Checked all LXC containers on ml110, r630-01, r630-02
- ✅ Checked all QEMU VMs on ml110, r630-01, r630-02
- ❌ No container found with IP 192.168.11.14
- ❌ No container found with MAC bc:24:11:ee:a6:ec

### Network Interface Check
- ⏳ Checking network interfaces on all hosts
- ⏳ Checking for orphaned containers

---

## Next Investigation Steps

### 1. Check Router/Switch ARP Tables

**Action**: Access ER605 router (192.168.11.1) and check ARP table
```bash
# Via Omada controller or direct router access
# Look for device with IP 192.168.11.14
# Get device information from router
```

### 2. Check Omada Controller

**Action**: Access Omada controller (VMID 103, 192.168.11.20 or 192.168.11.8)
```bash
# Check device list for 192.168.11.14
# Get device type, MAC, and connection info
```

### 3. Network Scan

**Action**: Perform network scan to identify all devices
```bash
# Scan 192.168.11.0/24 network
# Identify all active devices
# Match MAC addresses
```

### 4. Check for Hidden Containers

**Action**: Check for containers in unusual states
```bash
# Check /etc/pve/lxc/ on all hosts
# Look for config files with this IP
# Check for containers not in cluster view
```

---

## Resolution Strategy

### If Container Found

1. **Identify container** (VMID, host, name)
2. **Stop container**
3. **Change IP** to available address (e.g., 192.168.11.28)
4. **Restart container**
5. **Verify 192.168.11.14 is free**

### If Container Not Found

1. **Block IP at router level** (temporary)
2. **Power on r630-04**
3. **Configure r630-04 with 192.168.11.14**
4. **Monitor for conflicts**
5. **If conflict persists, investigate network device**

### If Network Device

1. **Identify device type**
2. **Reconfigure device** with different IP
3. **Update network documentation**
4. **Reserve 192.168.11.14 for r630-04**

---

## Recommendations

### Immediate Actions

1. **Access Omada Controller** to check device list
2. **Check router ARP table** for device information
3. **Perform network scan** to identify all devices
4. **Check for containers** in unusual locations/states

### Before Powering On r630-04

1. **Resolve IP conflict** completely
2. **Verify 192.168.11.14 is free**
3. **Document resolution**
4. **Prepare r630-04 configuration**

---

**Last Updated**: 2026-01-05  
**Status**: 🔍 **INVESTIGATION CONTINUING**  
**Priority**: 🔴 **HIGH** - Must resolve before powering on r630-04
