Update docs/tech_docs/OPENwrt.md

docs/tech_docs/OPENwrt.md

@@ -208,4 +208,82 @@ iface vmbr3 inet manual
 iface wlp2s0 inet manual
 
 source /etc/network/interfaces.d/*
-```
+```
+
+---
+For your standalone Proxmox setup, switching between static and dynamic IP configurations and managing virtual bridges are important tasks. Below, I'll provide a concise guide to handle these changes effectively and safely.
+
+### Switching from Static IP to DHCP:
+
+1. **Update Network Interface Configuration:**
+   - Open `/etc/network/interfaces` in a text editor:
+     ```bash
+     nano /etc/network/interfaces
+     ```
+   - Change the `vmbr0` configuration from static to DHCP:
+     ```bash
+     auto vmbr0
+     iface vmbr0 inet dhcp
+         bridge-ports enp3s0
+         bridge-stp off
+         bridge-fd 0
+     ```
+   - Save the changes and exit the editor.
+
+2. **Restart Networking to Apply Changes:**
+   - Apply the new network settings:
+     ```bash
+     systemctl restart networking
+     ```
+
+3. **Find the New DHCP-Assigned IP Address:**
+   - After the network restarts, check the assigned IP:
+     ```bash
+     ip addr show vmbr0
+     ```
+
+4. **Update `/etc/hosts` with the New IP:**
+   - Edit the `/etc/hosts` file to replace the old static IP with the new one:
+     ```bash
+     nano /etc/hosts
+     ```
+   - Modify the line with the old IP to the new one you just obtained:
+     ```plaintext
+     192.168.86.62 whitebox.foxtrot.lan whitebox  # Old IP
+     192.168.x.x whitebox.foxtrot.lan whitebox    # New DHCP IP
+     ```
+   - Save and exit.
+
+5. **Reserve IP in DHCP Server (Optional but Recommended):**
+   - To ensure the IP does not change on reboots, reserve the IP in your DHCP server settings to always assign the same IP to the MAC address of `vmbr0`.
+
+### Creating a New Virtual Bridge (`vmbrX`):
+
+1. **Add a New Virtual Bridge Configuration:**
+   - Edit `/etc/network/interfaces`:
+     ```bash
+     nano /etc/network/interfaces
+     ```
+   - Add a new bridge configuration at the end of the file:
+     ```bash
+     auto vmbrX  # Replace X with the next available number
+     iface vmbrX inet manual
+         bridge-ports none
+         bridge-stp off
+         bridge-fd 0
+     ```
+   - Save and exit the editor.
+
+2. **Activate the New Bridge:**
+   - Restart the networking service to bring up the new bridge:
+     ```bash
+     systemctl restart networking
+     ```
+
+### General Notes:
+
+- **Backup Configurations:** Always backup configuration files before making changes (`cp /etc/network/interfaces /etc/network/interfaces.bak`).
+- **Documentation:** Update all relevant documentation with the new bridge details and IP changes.
+- **Monitoring:** Monitor the network and server behavior after changes to ensure everything is functioning as expected.
+
+This approach provides a structured method to manage IP address configurations and virtual bridges on your Proxmox server, enhancing flexibility and ensuring consistent network settings across system reboots or changes.