<div>
<div class="content wysiwyg-content">
Not sure how to explain this: I have twenty site that link back to my CO. We are installing an HVAC device at each site. Each HVAC controller sends a UDP broadcast to the other HVAC devices on network so that they see each other. I have a 3Com 5500 layer three switch at each site being used as the router &nbsp;with a 3Com 4500 switches as the core switch at each site. Some of the controllers are plugged directly into the 5500 and some are plugged into the 4500s. My question is, do I need to enable UDP broadcast on the routers and the switches for this to work properly or should it work regardless?
</div>
</div>


Not sure how to explain this: I have twenty site that link back to my CO. We are installing an HVAC device at each site. Each HVAC controller sends a UDP broadcast to the other HVAC devices on network so that they see each other. I have a 3Com 5500 layer three switch at each site being used as the router  with a 3Com 4500 switches as the core switch at each site. Some of the controllers are plugged directly into the 5500 and some are plugged into the 4500s. My question is, do I need to enable UDP broadcast on the routers and the switches for this to work properly or should it work regardless?

UDP BROADCAST

Networking software modules are interfaced with a framework implemented on the machine's operating system that implements the networking functionality of the operating system. The best known frameworks are the TCP/IP model and the OSI model. Systems typically do not use a single protocol to handle a transmission. Instead they use a set of cooperating protocols, sometimes called a protocol family or protocol suite.[9] Some of the best known protocol suites include: IPX/SPX, X.25, AX.25, AppleTalk and TCP/IP. Other protocols indirectly related to networking include the hypertext transfer protocol (HTTP) and its related technologies, Dynamic Host Configuration Protocol (DHCP), Domain Name Server (DNS) and other Internet protocols.

Networking Protocols

The Windows operating systems have distinct methodologies for designing and implementing networks, and have specific systems to accomplish various networking processes, such as Exchange for email, Sharepoint for shared files and programs, and IIS for delivery of web pages. Microsoft also produces server technologies for networked database use, security and virtualization.

Windows Networking

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.