Issue
Understanding the impact of Sigma on IT networks and its communication requirements.
Product Line
Satchwell BAS & SigmaEnvironment
Satchwell Sigma
Cause
General information regarding Sigma’s behavior and requirements when integrated into an IT network.
Resolution
Sigma is designed to be IT-friendly and adheres to several IETF standards, ensuring compatibility and minimal impact on network performance.
1. Standards Compliance
Sigma complies with the following IETF protocols:
- RFC 791 – Internet Protocol (IP)
- RFC 972 – Internet Control Message Protocol (ICMP)
- RFC 826 – Address Resolution Protocol (ARP)
- RFC 950 – Subnet Mask
- RFC 1256 – Router Discovery
- RFC 768 – User Datagram Protocol (UDP)
- RFC 1058 – Routing Information Protocol (RIP)
2. Network Utilization
- Sigma typically uses 1–2% of a 100 Mbps Ethernet connection.
3. Communication Model
- Utilizes peer-to-peer communication.
- Device communication occurs only when required by the system or user.
4. Standalone Operation
- Devices can operate independently for extended periods during network outages.
5. Data Management
- Controllers can be configured to limit the frequency of global data exchanges.
6. Client Polling
- Sigma Remote Clients poll the Sigma Server to maintain connection integrity.
7. Protocol Usage
- Server ↔ Controllers/DNNs/ICs: Use UDP messages (size varies).
- Client ↔ Server: Use TCP messages (size varies).
8. Port Requirements
Sigma uses the following ports:
- 49152
- 3614
- 80
- 8080
9. Communication Speeds
- Sigma V53 devices: Communicate at 10 Mbps half duplex.
- Sigma ARM devices: Negotiate speed starting at 100 Mbps half duplex, then 10 Mbps full duplex, and finally 10 Mbps half duplex.
Additional Notes
- Sigma’s design ensures minimal disruption and efficient operation within modern IT infrastructures.
- For firewall and network configuration, ensure the above ports are whitelisted.
