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Today we celebrate the 14th annual of the System Administrator Appreciation Day! Dear boss, can you bring me the following things for a happy SysAdmin Day?: Cake & Ice cream Pizza Cards Gifts Words of gratitude Custom t-shirts celebrating the epic greatness of your SysAdmin(s) Balloons Streamers Confetti Thanks in advance, your Administrator 🙂 … Read more
In May I posted a tutorial for running a “router on a stick” with Cisco Router, Switch and HP Switch. Today I will show you to replace the Cisco Router with a Sophos UTM to route between different VLANs. First we will connect a Sophos UTM interface (in our example eth3) with our switch … Read more
Today I will open the box of pandora of switch virtualization 🙂 Switch virtualization is needed for configure etherchannels or LACP over two or more devices, configuration-redundancy, single-configuration and easy network expansion. In this example I will show you how to configure a stackwise cluster with Cisco Catalyst 3750-X switches: with Cisco StackWise you can … Read more
Most of us is using STP (Spanning Tree Protocol) within switched networks. In the last days I had problems on one location of a customer. We distribute new Cisco Catalyst 3750-X switches to the location and didn’t understand why desktop clients can’t boot via DHCP/PXE (Preboot Execution Environment). With globally activated STP/RTSP on the switches, every … Read more
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