The ramblings of a computer geek
Had a little bit of trouble with this Micro-HDMI to VGA Adapter when trying to use it with Kali Linux, the Raspberry Pi would appear to boot up, but no picture was displayed. The solution was pretty straightforward, from another machine I opened the config.txt file and uncommented the following lines: The saved the file […]
More...Very occasionally a QSFP+ port might not be the correct form factor, what if you have a switch with only QSFP+ ports e.g. an Extreme Networks X770 but you need to connect up a device with an SFP+ port. Well, although you’ll be wasting a QSFP+ port this may help you. Extreme Networks provide what […]
More...The QSFP+ or QSFP28 ports of the Extreme Networks switches can be partitioned, what this means is you can make a 40Gbit QSFP+ port appear as 4 x 10Gbit SFP+ ports, however you’re require a suitable QSFP+ module for example with MTP port and a fan-out cable to split that MTP into 4 x LC […]
More...The OSI Model (Open Systems Interconnection) model is a set of rules and requirements to model and conceptualise the communication between two (network) systems. Yes, its theory, but in computing and networking it can be useful to use as a basic guide when troubleshooting. It helps you to rule-in or rule-out where a problem might […]
More...Notepad++ can be quite a handy tool to use, I often use it when building up bulk CLI commands to enter into switches or firewalls. Say you had a list of hosts and wanted to add some text to the beginning, that’s fairly easy, you just click, hold ALT and then select all the lines, […]
More...A fairly simple approach to providing uplink resilience. There are methods like EAPS or MLAG to give you uplink resilience, but sometimes you just need something simple. A redundant physical (or “Redundant Phy”) is essentially two uplinks to upstream switches and to avoid a loop, the downstream switch (i.e. the one with the redundant phy […]
More...If you wish to share a password with a user there’s various ways you can achieve it. But not all of them are secure! Let’s say you have the scenario that you are onboarding a user or you’ve had to reset their password for some reason. If that person is on-site, that’s pretty easy, you […]
More...Seen this issue a few times even on the NimbleOS 5.x version, when joining the array to Active Directory for authentication, you get this error when performing via the GUI: The only way i’ve found around this is to perform via the CLI on the Nimble, you should also pre-create the computer object in AD […]
More...NagiosXI and other monitoring tools have ways to determine if your SSL certificates on say a web server are nearing expiry, but what if you have software that uses a certificate but that certificate is not directly poll-able over the standard HTTPS checks. The script which can be found here, is a passive check, so […]
More...IMPORTANT! The below scripts are not supported by Dell nor is there use on a Dell ECS node, you therefore utilise these steps at your own risk. We have these scripts running on Dell ECS nodes in production to collect hardware information and report it back periodically and no issues have been identified yet. The […]
More...