July 16, 2013

Powerconnect: Configure Link Aggregation Groups

Today we will be configuring LACP to interconnect some switch stacks as part of a network upgrade.  Please keep in mind that part of configuring the LAG will result in the ports losing connectivity, so while it is not necessary to use a console cable, please keep in mind how you are connecting to the switch and if you will interrupt that connection by any […]
July 10, 2013

Dell Powerconnect 3500: Enable SSH and Disable Telnet

Most modern switches include the ability to use SSH as a remote communications protocol.  Here we will enable that functionality and disable telnet on the Dell Powerconnect 3548 switches. Enable SSH In order to enable SSH we need to generate the keys which will be used by SSH to encrypt the traffic. Disable Telnet Depending on your config you might not need to disable this, […]
July 9, 2013

Dell Powerconnect 5500: Enable SSH and Disable Telnet

Most modern switches include the ability to use SSH as a remote communications protocol.  Here we will enable that functionality and disable telnet on the Dell Powerconnect 5548 switches. Enable SSH In order to enable SSH we need to generate the keys which will be used by SSH to encrypt the traffic. Disable Telnet Depending on your config you might not need to disable this, […]
July 8, 2013

Dell Powerconnect 6200: Enable SSH and Disable Telnet

Most modern switches include the ability to use SSH as a remote communications protocol.  Here we will enable that functionality and disable telnet on the Dell Powerconnect 6248 switches. Enable SSH In order to enable SSH we need to generate the keys which will be used by SSH to encrypt the traffic. Disable Telnet Depending on your config you might not need to disable this, […]
October 24, 2012

Linux KVM: Ubuntu 12.10 with Openvswitch

Today I am revisiting my previous post on Openvswitch on Ubuntu 12.04.  Things have changed since then.  Previously Openvswitch was relatively new and as such the userland tools (with libvirt being the one I use) didn’t support it yet, so while you could have used Openvswitch by executing the kvm processes for each VM manually.  Since this was a predictable problem the Openvswitch guys created […]
March 26, 2012

Linux-KVM: Ubuntu 12.04 with Openvswitch

UPDATE: October 29, 2012 This article doesn’t work on Ubuntu 12.10, to use Ubuntu 12.10 please refer to my new article here. Openvswitch is a better way of managing your virtual networking stacks for KVM and Xen.  This can be used instead of the bridge-utils package, and has the ability to use VLANs, LACP, QoS, sFlow, and others.  In this article we will be using […]
March 5, 2012

ESX 5: Link Aggregation with Netgear GSM7352S

As one of our final validation points in an ongoing project has been enabling ESX to use a LAG on both the Management and VM Networks.  The last time we did this we were unable to get it to work, and it turns out the solution was actually very simple.  Basically the core of the issue was that we were attempting to use Dynamic LACP […]
February 29, 2012

Dell PowerConnect 6224: Stacking Module Dual Master

We use a couple of Dell PowerConnect 6224 switches in our storage network, however when they were first deployed we ran into an issue with the stacking modules. Basically when you brought up the switches they would both see themselves as master, and would not “stack” correctly. Turns out the solution was rather easy but not well documented.  Also as a side note, I have […]
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