Entries Tagged as 'General'

Changing the default policy for new LUNs

To change the default policy use SSH to connect to ESXi/ESX host.

# esxcli storage nmp satp list

To change e.g. the standard policy for storage type VMW_SATP_ALUA from fixed to Round-Robin (RR) the following command is necessary.

# esxcli storage nmp satp set s VMW_SATP_ALUA P VMW_PSP_RR

Reboot the ESXi/ESX host to apply the changes

HOWTO: How do I list applications using network ports?

netstat -nabo

C:\WINDOWS\system32>netstat -nabo

Active Connections

Proto      Local Address        Foreign Address      State                   PID
TCP                       LISTENING     4

Can not obtain ownership information
TCP                      LISTENING 1004
TCP                     LISTENING       4

Robocopy usage

As I use more often RoboCopy to get files from one server to the other. Here is what I use to get this done:

 ROBOCOPY "<source>" "<target>" /COPYALL /DCOPY:T /MIR /SEC /e /R:1 /W:1 /mt:4 /LOG:"C:\temp\<filename>.log"

Onboard Administrator not pingable after upgrade to 4.40 and up

On some occasions, I have seen that after upgrading from (for example from 3.70 to 4.40 and up), the Onboard Administrator is not accessible anymore. Even connecting direct with a Laptop to the OA port does not reply on a ping.

The problem came from the fact that the OA’s IP was tagged and had fallen back to the default VLAN, but still being tagged.

You can change it back to the correct VLAN by setting it on the Front Operational Pannel.

Cisco AnyConnect “Failed to initialize connection subsystem”

  • 1. Close the Cisco AnyConnect Window and the taskbar mini-icon
  • 2. Right click vpnui.exe in the “Cisco AnyConnect Secure Mobility Client” folder. (I have it in “C:\Program Files (x86)\Cisco\Cisco AnyConnect Secure Mobility Client\”
  • 3. Click on the “Run compatibility troubleshooter” button
  • 4. Choose “Try recommended settings”.
  • 5. The wizard suggests Windows 8 compatibility.
  • 6. Click “Test Program”.  This will open the program.
  • 7. Close
  • Some people may need to repeat the above steps for vpnagent.exe. That is the local service that supports the client user interface.

Segmented Brocade Switch

Once in your lifetime you encounter that you have changed something in one SAN switch. And after a while you see that the other switch(es) where not connected to the switch where you made zoning changes.

If you join them again (fixed it by replacing an defective SFP that was the up-link to my changed switch) you’ll see in the CLI on the ISL port when you enter ‘switchshow’ that the ISL port gives “Segmented”.


To fix it (nicely) you must change both switches in a stats that both have OR the same config again OR you just clear the zoning on one switch (as it should be redundant).

BUT in most environments it’s not applicable  so:

1 Go to both switches via CLI.
2 Login
3 Disable the ISL port on one side (switch). (portdisable x)
4 Do a zoneshow on boths switches and capture the output.
5 Save the output to 2 different files.
6  Take Notepad++ (with the compare plugin installed)
7  Open the two files.
8 Go to Plugins > Compare > Compare (Alt-D).
9  In the most right screen you will see with green lines where there are differences.
10  Look them up, and change them in the zonig. In such a way that both switches have the same config again. (Remember that if you empty an alias in this process, the Save and Enable config will not proceed). With no error!
11 Go to the switch where the ISL port is disabled. (CLI)
12  Enable the port (portenable x).
13 You should now see the WWN from the other switch, with eventually ‘downwstream (or upstream)’. And also the switch name of the other side of the ISL.

All done!

Good luck.

LC/PC, LC/SPC or LC/UPC patch-cord

Cable Specifications

Singlemode optical fiber with a coating of Ø ext. 0.25 mm
Tight buffered fiber, Ø ext. 0.90 mm
Aramid yarns
PVC low-smoke flame-retardant OuterSheath, Ø ext. 3 mm
Jacketing color yellow
Minimum bending radius (mm) 30
Maximum load (N) 300
Operating temperature -20 ºC a 70 ºC
Type of fiber Singlemode
Core/ Clad diameter (µm) 10/125
    Wavelength 1.310 nm <0.40
    Wavelength 1.550 nm <0.25
Chromatic Dispersion (ps/km x nm)
    Wavelength 1.310 nm <2.0
    Wavelength 1.550 nm <20.0
Other features, according to CCIT G.652







1.310/1.550 nm

Insertion Loss (I.L.):

<0.3 dB

0.15 dB

Return Loss (R.L.):



>30 dB
>40 dB
>50 dB


32 dB
42 dB
52 dB

Stability of I.L. in the range -20º to +70ºC:

<0.1 dB

0.05 dB

Stability of I.L. at 40ºC and 90% RH for 24 hours:

<0.2 dB

0.1 dB


P.I. < 0.1 dB in 1000 connections

Minimum operating life

1000 mating cycles

Mechanic strength: fall, impact and vibrations

<0.10 dB


Tensile strenght


4 kg

UPS management card HP UPS (R5500) error on all hosts

I found out when installing the agent for a management card for theR5500 XR UPS from HP, with agents running on Hyver-V 2008 R2. There can be a situation that an a certain time all hosts in the management interface in the UPS management card (fw 2.1.11) are crossed red.

This issue comes forward when a host from the Hyver-V servers still does have it’s firewall turned on.

After disabling the firewall you won’t see this issue again.



EVA VAAI compliant?

Question that are thrown to me are:

Is the EVA VAAI compliant?
The EVA will be “vStorage APIs for Array Integration” (in short VAAI) compliant. It is NOT compliant at the moment.

Will it be in the next firmware release. Probably NOT.

The next… Probably YES. So we will have to wait, but until then the EVA should be fast enough by it’s own.

More information when available.

Quick install applications

Also getting tiered of over and over installing applications that you need of want in new installations (like Google Chrome, Java, etc…)

Take a look at http://ninite.com

Select the applications from the list you want to install. You will get a downloadable executable, that will fully automatically install the chosen apps. Versions you already installed by hand will be skipped.