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more than ten years later (IEEE 802.1ax-2008), but everybody calls it 802.3ad and serverguys still prefer static bonding with round-robin distribution [without telling network admins about that decision] to confuse (or tear down) ethernet-networks. What a stupid default: default bond0 interface with balance round robin mode Awsome 🙂 FWM-2-STM_LOOP_DETECT How a single server affects vMotion, SLB-VIP-Mobility, First-Hop Redundancy-Protocols (VRRP, HSRP you name it) in 2019. I won’t expect technology like software-defined-networks to solve human ignorance.Read More →

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2/3/4-Node Cluster no Fabric-Interconnects (FIs) Edge-Servers connected to LAN-Switches „back-to-Back“-Option for 2-Node Cluster only „RF2“-redundancy    Read More →

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Beitrag ansehen Performance All-NVMe Cluster HyperFlex Acceleration Engine  Scaliabilty 2:1 Compute-to-Converged Nodes-Ratio Data Protection Stretched Cluster (Metro Availability) „Cisco HyperFlex Premier“-Cisco Data Center Enterprise Agreement TierRead More →

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Use-Case Investment-Protection VM-Migration Fibre-Channel   Ethernet iSCSI FCoE FC-Setup VSAN WWNN/WWPN-Pool vHBA templates FC-SAN Zoning / LUN-Masking FC-Switch Directly connected FC-Storage supported zoning within UCS-FI HyperFlex SAN Connectivity Policy iSCSI Setup VLAN MAC-Pool/vNIC-Template(s) HyperFlex LAN-Connectivity Policy  Read More →

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The existing Windows-Comman-Script has been enhanced so it now waits until the Router-VM is up got an IP-Address assigned using DHCP. For Demonstration-Purposes an SSH-Connection will be established. The public-key of my laptop-ssh-client is part of the slipstreamed Router-Configuration. Deploy a Router-VM with hostname „CSY“. Establish an SSH-Connection to the discovered Router-IP: Have a look to the startup-config used: This is the „CMD“-Script used:Read More →

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The following version adds a „-c“ option: „Connected IP-Address“-Check. the script exits, when the Router-VM is up and running and has an usable IP-Address The Script still checks all CDP-Packets received at the specified Interface: If the Sender has the correct „Hostname“ it reads the CDP-Management-IP-Address announced. This IP-Address has to be within the IP-Range of any connected IP-Network at the specified Interface. So it’ll be possible to establish a SSH-Session to the router-VM.Read More →

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You got the task to generate a list of IP-Networks connected to LAN „VirtualBox Host-Only Network“. There might be more than one IP-Network. Use Scapy to crawl through all Interfaces and get the human-readable interface name [only required for windows users]. Use NetIfaces to get a list of IP-Addresses connected to this interface. Use IPAddress to calculate the IP-Network(s) directly connected. In my case, only one subnet is directly connected: 192.168.56.0/24Read More →

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I expected a nobrainer: The suggested URL to download the missing software is wrong (HTTP 404). Go to the Microsoft-Repository Tools for Visual Studio 2017 or use the direct link to vs_buildtools.exe …it’s about 1.2MB run „vs_buildtools.exe“ …it downloads ~ 70 MB Select „Workloads => Windows => [x] Visual C++ Build Tools“ => [Install] …it downloads 1.12 GB …and installs and … unlucky… reboot required Now netifaces can get installed:Read More →