88 lines
4.0 KiB
Markdown
88 lines
4.0 KiB
Markdown
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Here's a **structured summary** of your network requirements and design, incorporating your latest updates and clarifications:
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---
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### **Network Overview**
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#### **1. VLANs and Subnets**
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| VLAN | Subnet | Gateway IP | Avahi Server IP | mDNS Proxy IP |
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|------|--------------------------------|------------------|------------------|----------------|
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| 15 | 172.16.19.0/255.255.252.0 | 172.16.19.254 | 172.16.19.250 | 172.16.19.251 |
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| 19 | 192.168.151.0/255.255.252.0 | 192.168.151.254 | 192.168.151.250 | 192.168.151.251 |
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| 7 | 172.16.111.0/255.255.248.0 | 172.16.111.254 | 172.16.111.250 | 172.16.111.251 |
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**Note:** All VLANs are routed via the **Sophos XGS4300**, which acts as the **DHCP server** for all VLANs.
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---
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#### **2. Avahi Server Configuration**
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- **Local Avahi Servers**:
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- **VLAN 15**: Runs Avahi on `172.16.19.250` for local discovery.
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- **VLAN 19**: Runs Avahi on `192.168.151.250` for local discovery.
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- **VLAN 7**: Runs Avahi on `172.16.111.250` for local discovery.
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- **Central Avahi Server** (mDNS Proxy):
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- **IPs**: `172.16.19.251`, `192.168.151.251`, `172.16.111.251` (untagged interfaces for each VLAN).
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- **Configuration**:
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```ini
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[reflector]
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enable-reflector=yes
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#reflect-ipv=no
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#reflect-filters=_airplay._tcp.local,_raop._tcp.local
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```
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- **Purpose**: Acts as a **central mDNS reflector** to forward traffic between VLANs, enabling Apple devices in VLANs 15/19 to discover Apple TVs in VLAN 7.
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---
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#### **3. mDNS Proxy VM (Central Avahi Server)**
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- **OS**: Debian.
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- **Network Configuration**:
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- Uses **`/etc/network/interfaces`** to assign static IPs for each VLAN (ending in `.251`).
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- Interfaces are **untagged** (virtual) for each VLAN.
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- **Function**:
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- Forwards mDNS traffic between VLANs (e.g., `_airplay._tcp.local`, `_raop._tcp.local`).
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- Ensures Apple devices in VLANs 15/19 can discover Apple TVs in VLAN 7 via Bonjour.
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---
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#### **4. ESXi and VLAN Management**
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- **Hyper-Visor**: ESXi.
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- **vSwitch Configuration**:
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- Each VLAN is assigned a **virtual port group** with the corresponding subnet.
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- VMs (Avahi servers, mDNS proxy, etc.) are assigned to the appropriate VLAN port group.
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- **IP Assignment**:
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- VMs use **static IPs** (`.250` for local Avahi servers, `.251` for central Avahi server).
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---
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#### **5. Switch Configuration**
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- **Switches**: Managed Level 2 switches.
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- **IGMP Snooping**:
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- **Recommendation**: **Enable IGMP snooping** on all switches.
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- **Rationale**:
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- While mDNS (Bonjour) uses **UDP** and not IGMP, **other multicast services** (e.g., `546/udp` for DHCPv6, `80/443` for HTTP/HTTPS) may rely on IGMP.
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- IGMP snooping prevents unnecessary multicast traffic flooding, improving network efficiency.
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- **Note**: If only mDNS is used, IGMP snooping is **not strictly required**, but enabling it is **beneficial for future scalability**.
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---
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### **Key Considerations**
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- **Resource Allocation for VMs**:
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- **Avahi Servers (VLANs 15, 19, 7)**: Minimal resources (1 vCPU, 512MB RAM).
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- **Central Avahi Server (mDNS Proxy)**: Slightly higher resources (2 vCPUs, 1GB RAM) due to traffic forwarding.
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- **Firewall Rules**:
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- Ensure **UDP ports 80, 443, 546/udp, 546/tcp** are open between VLANs 15/19 and VLAN 7.
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- Allow **mDNS traffic (UDP 5353)** for Bonjour discovery.
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- **Testing**:
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- Use `avahi-browse` on Apple devices to verify Apple TV discovery.
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- Test service ports (e.g., `curl http://<AppleTV-IP>:80`) to confirm connectivity.
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---
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### **Summary of Design**
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- **VLAN Isolation**: Each VLAN operates independently with its own subnet and Avahi server.
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- **Central mDNS Proxy**: Acts as a bridge for Bonjour discovery between VLANs, enabling cross-VLAN service discovery.
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- **Network Efficiency**: IGMP snooping is enabled to optimize multicast traffic handling.
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- **Scalability**: The design supports future additions (e.g., more Apple devices, services) without overhauling the architecture.
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Let me know if you’d like a **diagram** or **Debian interface configuration examples**! 🚀 |