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Reverse Polarity has been deploying and supporting open-source and open standards technology solutions for almost two decades. We have proven expertise in the technology industry supporting Linux, Novell, FreeBSD, Unix, Apple and Microsoft.
We have a reputation for being "the expert's expert" within the technology industry and amongst our vendor, client relations, and partnerships. Our expertise revolves around technologies and processes used to secure, stabilize and maintain network infrastructures and services.
We provide technology assessments, recommendations and solutions to fix, upgrade, maintain, and deploy network infrastructures, systems, applications, and monitoring tools that best fit our clients' situations and requirements.
Our solutions have a reputation for being stable and reliable. Each solution is strategically assessed per each client's technology needs, environments, situations, budgets and objectives.
Our main client base consists of public, private, boarding, and day schools.
In my previous post HERE, I gave a brief description of Apple's implementation of the mDNS protocol which they named "Bonjour". I explained why the protocol does not function in a segmented (subnetted) network and described the open-source solution that we deploy for our clients which is comprised of a free, open-source Gentoo Linux (virtual) server running the open-source implementation of the mDNS protocol called "Avahi."
My goal in this post is to describe in detail exactly how to implement your very own virtual "Bonjour Gateway" in a VMware vSphere environment.
As more schools implement wireless networks, BYOD programs, and Apple TVs, they are quickly finding that on properly configured and subnetted networks they are unable to locate their wired Apple TVs with their wireless iPads, iPhones, Andriod devices, etc and therefore are unable to use Apple's "AirPlay" to stream music or videos to their Apple TVs, and are also unable to mirror their iPad's screen to the Apple TVs.
This is because the protocol by which Apple devices announce themselves and locate other Apple devices on a network does not work when these devices are on different subnets.
AppleTVs and other Apple devices on home networks don't have any problem locating each other. All the devices appear to magically "just work"(TM) together because all the devices are on the same subnet (broadcast domain) and Bonjour works perfectly fine in this type of small, non-routed network.
However, Bonjour is a multicast (broadcast) protocol, and as such does not traverse across routers to other subnets. When Apple devices are on a larger, properly segmented (subnetted) network, Apple devices on one subnet will not be able to locate Apple devices on another subnet.
With the severe thunderstorms and tornado warnings we have been recently subjected to, we inevitably end up having problems with the POTS lines connected to our Asterisk system. The problems have been due to either a physical issue between our office and the CO which the phone company has to repair, or a simple issue of forgetting to plug the POTS lines back into the analog card once the storms had passed.
The up side to this is that we have a very quiet morning with no ringing phones the day after a major storm, however the reality is that we may be missing important phone calls from our clients!