SHIFT-WIKI - Sjoerd Hooft's InFormation Technology
This WIKI is my personal documentation blog. Please enjoy it and feel free to reach out through blue sky if you have a question, remark, improvement or observation. See below for the latest additions, or use the search or tags to browse for content.
Fix: VM gets Network Disconnected After vMotion
Summary: A possible cause for a disconnected VM after a vMotion
Date: Around 2014
Refactor: 26 January 2025: Checked links and formatting.
Symptom: after a vMotion the network card gets disconnected, and even when the box is checked, still the VM is not getting connected.
Issue: The vSwitch gets created with 120 ports by default, if the number of VMs/NICs goes over this there are no ports left. This is not checked by vMotion/DRS/HA so no warnings will be displayed. To solve it, vMotion the VMs back, change the number of ports of the vSwitch and reboot the host.
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Fix: vCenter 5.1 startup error 7024
Summary: How to fix vCenter 5.1 startup error 7024.
Date: Around 2013
Refactor: 1 March 2025: Checked links and formatting.
We've had several times now that the inventory service wouldn't start anymore, leaving event id 7024 in the eventlog. We do not keep backups of the inventory database, so every time it happens we decide to reset the inventory database, after which some registering needs to be done. What always seems to be needed is to (re)register the inventory service with vCenter, and we also had a few times that it was required to (re)register the inventory service with the Single Sign On (SSO) service.
I find them confusing however because they show fixes for different versions mixed up in each other, so I decided to create my own article.
Fix: Sybase License Error 957
Summary: This fix changes the MAC address for a VMware ESX VM.
Date: Around 2013
Refactor: 2 January 2025: Checked links and formatting.
Fix: ASDM: Fail to establish SSH session
Summary: A Fix for a Cisco ASA firewall when you can't login over SSH.
Date: Around 2007
Refactor: 16 January 2025: Checked links and formatting.
Symptom: Unable to establish a SSH session with a Cisco ASA firewall. After logging in using ASDM you see this error in the log:
fail to establish SSH session because RSA host key retrieval failed
To fix, go to the command line interface:
ASDM → Tools → Command Line Interface
And enter these commands:
conf t crypto key generate rsa general-keys modulus 1024
Now you can establish a connection over SSH.
This wiki has been made possible by: