Protected: Reset Compellent SC4020 to factory settings
DHCP High Availability with Windows Server 2012 R2
Reading Time: 4 minutes Hi all, in this guide I will show you how to configure the DHCP service in high availability mode. In previous Windows versions like Windows Server 2008 R2 and Windows Server 2003, you have two options to make DHCP highly available: DHCP in a Windows failover cluster. This option places the DHCP server in a cluster…
Brocade enabling and disabling Access Gateway mode
Reading Time: 2 minutes Use the following steps to enable and disable Access Gateway mode. After you enable AG mode, some fabric information is erased, such as the zone and security databases. Enabling AG mode is disruptive because the switch is disabled and rebooted. For more information on the ag commands used in these steps, refer to the Fabric…
Dell Compellent Upgrade How To
Reading Time: < 1 minute Hi all, I’ll try to explain, based on my experience, which is the best way to run successfully a CML upgrade. We have different scenarios: Firmware upgrade Storage expansion Hardware upgrade Firmware Upgrade First of all you have to understand the starting point and the ending point. It is really important which firmware is currently…
Configure VLAN trunk on CentOS/RedHat
Reading Time: < 1 minute If you need to create a tagged VLAN on you CentOS/RedHat distribution follow this simple guide. I’ll try to explain how to reach this goal with an example. after that Suppose that a host should reach two differents VLANs both carried by a trunk connected to physical interface and that the first eth has ip 192.168.100.1/24…
Upgrade brocade firmware from USB
Reading Time: < 1 minute Upgrading brocade firmware from USB is really simple. Just follow this procedure. Keep in mind that Brocade switches support firmware download from a Brocade-branded USB device. You cannot use a third-party USB device. Enabel USB usbstorage -e Upload and apply firmware firmwaredownload -U /usb/usbstorage/brocade/firmware/v7.3.0 Disable USB (You must unmount the USB device) usbStorage -d That’s…
Bonding On CentOS
Reading Time: 2 minutes Channel bonding is a computer networking arrangement in which two or more network interfaces on a host computer are combined for redundancy or increased throughput. We have different bond modes: mode=1 (active-backup) Active-backup policy: Only one slave in the bond is active. A different slave becomes active if, and only if, the active slave fails.…
VMware, RDP error after removing and adding a virtual nic on Windows 2008R2
Reading Time: < 1 minute Hi everyone, should happen that, after removing a virtual nic on a vm running windows 2008R2, and after re-adding a newone, you cannot connect using RDP protocol. The problem is related to RDP-Tcp connection. If you execute Remote Desktop Session Host Configuration unnder connection you can find the default connection named RDP-Tcp If you have a…
Install OMSA on CentOS/RedHat
Reading Time: < 1 minute If you need to install Open Manage Server Administrator (OMSA) on a Linux (CentOS or RedHat) system the fastest way is the following: Note 1: These instructions work for RHEL5, RHEL6, CentOS, Scientific Linux. Note 2: The version of yum distributed on CentOS 3 by default is too old (yum 2.0.8). You will need to upgrade…