Category Archives: Uncategorized

Kemp Load Master R320

One of the load balancer vendors I have been working with quite a lot is Kemp, this shouldn’t be new I suppose.

A typical load balancer is configured in a “2 armed” scenario: one NIC is connected to the ‘external network’ which typically is the network where the clients connects to while the other NIC is connected to the ‘internal network’ where the servers connect to.

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A call to a PSTN number failed due to non availability of gateways in Lync 2013

During a migration project I ran into a nasty issue where I was not able to perform any outbound calls via the mediation server and the SIP trunk. As soon as I entered a phone number in my Lync 2013 client and hit the ‘dial’ button the call failed, immediately.

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Using an F5 LTM Load Balancer for Reverse Proxy with Lync 2013

Ok, I couldn’t resist it… In my previous blog I wrote about publishing Lync services using a Kemp Load Master. Since I’m not married to Kemp (although you might think differently, and so does Marco 😉 I also have an F5 LTM up-and-running in my lab. Time to have a closer look at the F5 when it comes to reverse proxy with Lync 2013.

Lync Configuration

Again, in my lab I have a Lync 2013 Enterprise Edition, in the perimeter network I have a Lync 2013 Edge Server, but I will use an F5 LTM load balancer.

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