Here is a chart for the various DWDM optic channels below. Wavelenght band overview : O-Band : 1270nm to 1370nm E-Band : 1371nm to 1470nm S-Band : 1471nm to 1530nm C-Band : 1531nm to 1570nm L-Band : 1571nm to 1611nm Channel Wavelength (nm) Frequency (THz) 72 (DWDM Channel C72) 1520,25 197,20 71 (DWDM… Read More »
Have you forgotten you Avast Enterprise Administration console password? Fortunately, there is a way to reset it using the “AmsTool.exe” utility, provided with the software. 1. Open the Command Prompt with administrative rights. 2. Enter the following command : “C:\Program Files\AVAST Software\Enterprise Administration\AmsTool.exe” /pwdreset NOTE : If for any reason the command does not complete,… Read More »
As you probably wanted to extend your Brocade fiber channel fabric by connecting your existing switch to a new one, you probably noticed the following behaviour : 1. The port is blinking (green light) 2. The following message can be shown in the event log : Warning port 0, domain IDs overlap. Switch 19 1 FABR-1001… Read More »
Trying to uninstall the MacAfee Enterprise Agent and get the following error message? Unable to uninstall MacAfee when it is in Managed Mode. To resolve this matter and go through with the uninstallation, you have to change it to unmanaged mode as followed : 1. Open the command prompt 2. Go through the program installation… Read More »
If you have a Cisco ASR or smaller service router, you probably noticed that the device have a dedicated management interface. This special interface is a mapped to a Vritual Routing and Forwarding (VRF) instance. VRF allow multiple routing tables to coexist within the same router. You will first ensure that you have the VRF… Read More »
Have you experienced the following random error while printing with CUPS? Unable to send trailing nul to printer: Broken pipe printer PRLAX05 disabled since Wed 11 Nov 2015 02:53:29 PM PST – Unable to write print data: Broken pipe There could be multiple reasons for this issue to happen. Have a look at the following : 1. Make… Read More »
If your ownCloud installation is running on Debian and have been installed with the packages, you may have end up with the following results while running “apt-get update or upgrade” : The following packages were automatically installed and are no longer required Full output : # apt-get upgrade Reading package lists… Done Building dependency tree… Read More »
Running Windows 7 and eager to upgrade to Windows 10 but you do not see the update proposal in Windows update? Here is the checklist to go through and make sure you have all the requirements in order to get the free upgrade : 1. You are running a genuine version of Windows 2. Make… Read More »
Since the latest major version release of CentOS/RHEL 7, it seem that we wen’t a bit crazy about the whole systemd thing… Seriously, having a network interface named “eno16780032” isn’t that great! Fortunately, there is a a way of getting back the old naming convention by following these steps : 1. Edit the Grub configuration… Read More »
Having this error message trying to update your iPhone 5s to iOS 9.3? Unable to Verify Update iOS 9.3 failed verification because you are no longer connected to the Internet I have encountered this behaviour on a iPhone 5s device and it seem that this is also occurring on older devices such as iPad Air as well.… Read More »