XenServer 5.6 FP1 Realtek NIC Issue

If you are using Realtek NIC (RTL8111/8168B) and after upgraded from XS 5.6 to XS 5.6 FP1, you encountered the network is not working, try the following workaround.

$ echo "options r8169 use_dac=1" >> /etc/modprobe.conf

Restart and now the NIC should be functioning properly.

Credits: http://blog.root1024.ch/virtualisierung/citrix-xenserver/nach-update-auf-xenserver-5-6-1-fp1-kein-netzwerk-mehr/

Virtual Desktop Agent Installation

If you are encountered the following error during the VDA installation,

kindly try to use msiexec with the following parameter.

msiexec.exe /i XdsAgent_x86.msi INSTALLONWDDM=1 CONTROLLER_NAMES=DDC-HOST ENABLE_HDX_PORTS=1

And if you want to have a log, just add
e.g. msiexec.exe /i XdsAgent_x86.msi INSTALLONWDDM=1 CONTROLLER_NAMES=DDC-HOST ENABLE_HDX_PORTS=1 /l*v C:\vda-install.log

This error normally happened if you have a Windows Display Driver Model (WDDM) installed on the VDA.

XenServer - How to go to Safe Mode

- At the boot prompt, type menu.c32
- Choose safe from the TUI presented.

That's all.