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Co-authored-by: Cursor <cursoragent@cursor.com>
163 lines
3.5 KiB
Markdown
163 lines
3.5 KiB
Markdown
# Simple DHCP Deployment - All NICs with IP Detection
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## Simplified Approach
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Instead of trying to detect interface speeds, we now:
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1. **Detect all physical NICs**
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2. **Configure all with DHCP** (or first two for vmbr0/vmbr1)
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3. **Let DHCP assign IPs** to connected interfaces
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4. **Detect which interfaces got IP addresses**
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## Scripts Available
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### Option 1: Configure All NICs with DHCP (Recommended)
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```bash
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./network-config-dhcp-all.sh
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```
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This script:
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- Detects ALL physical NICs
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- Creates a DHCP bridge for EACH NIC (vmbr0, vmbr1, vmbr2, etc.)
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- Shows which bridges got IP addresses
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- Works for any number of NICs
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**Use this if you want to configure all NICs and see which ones get IPs.**
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### Option 2: Configure Two NICs (vmbr0/vmbr1) with DHCP
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```bash
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./network-config.sh
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```
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This script:
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- Detects all physical NICs
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- Uses first two NICs for vmbr0 (LAN) and vmbr1 (WAN)
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- Both configured with DHCP
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- Shows which ones got IP addresses
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**Use this if you only want vmbr0 and vmbr1 configured.**
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## Quick Deployment
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### On R630 (pve2)
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```bash
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cd /opt/proxmox-network-config
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# Option A: Configure all NICs
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./network-config-dhcp-all.sh
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# Option B: Configure just vmbr0/vmbr1
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./network-config.sh
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```
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### On ML110 (pve)
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```bash
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cd /opt/proxmox-network-config
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./network-config.sh
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```
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## How It Works
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1. **Detects all physical NICs** (excludes bridges, bonds, VLANs)
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2. **Configures bridges with DHCP** on all (or first two)
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3. **Applies configuration** and waits for DHCP
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4. **Shows IP detection results** - which interfaces got IPs
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## IP Detection Results
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After deployment, the script shows:
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```
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✓ vmbr0 (nic0): 192.168.1.49/24
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✗ vmbr1 (nic1): No IP address assigned
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✓ vmbr2 (nic2): 203.0.113.10/24
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```
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This tells you:
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- Which interfaces are connected and have DHCP
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- Which interfaces got IP addresses
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- Which ones to use for LAN vs WAN
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## Example Usage
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### Step 1: Preview Configuration
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```bash
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DRY_RUN=true ./network-config-dhcp-all.sh
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```
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Review the configuration to see which NICs will be configured.
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### Step 2: Apply Configuration
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```bash
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./network-config-dhcp-all.sh
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```
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### Step 3: Check IP Detection
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The script automatically shows which bridges got IP addresses. You can also check manually:
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```bash
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ip addr show
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```
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### Step 4: Verify Routing
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```bash
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ip route show
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```
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The default route should go through the interface with the public IP (WAN).
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## Advantages
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✅ **Simple** - No complex speed detection
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✅ **Reliable** - DHCP determines connectivity
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✅ **Flexible** - Works with any number of NICs
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✅ **Clear** - Shows exactly which interfaces got IPs
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✅ **Automatic** - Let DHCP decide which interfaces are active
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## Troubleshooting
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### No IPs Assigned
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If no interfaces get IP addresses:
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- Check cables are connected
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- Verify DHCP servers are available
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- Wait a few moments - DHCP can take time
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- Check: `dhclient -v vmbr0`
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### Wrong Interfaces Selected
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If you want specific NICs:
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```bash
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# For network-config.sh (two NICs only)
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NIC1_OVERRIDE=nic2 NIC2_OVERRIDE=nic3 ./network-config.sh
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```
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For `network-config-dhcp-all.sh`, it configures all NICs, so you can see which ones get IPs.
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### Check Interface Status
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```bash
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# See all interfaces
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ip link show
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# See IPs on all bridges
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for br in vmbr0 vmbr1 vmbr2 vmbr3; do
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ip addr show $br 2>/dev/null | grep "inet " || echo "$br: No IP"
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done
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```
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## Which Script to Use?
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- **`network-config-dhcp-all.sh`**: Configure ALL NICs, see which ones get IPs
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- **`network-config.sh`**: Configure just vmbr0/vmbr1 with first two NICs
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Both use DHCP and detect IP addresses automatically!
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