FOG 33b - installation - HP Elite 8300 SFF

[Alistair]

That’s a good point about multicast because I have just set up a new multi VLAN network on pre-existing switches.
Maybe multicast has been disallowed. hmmm

[Tom Elliott]

Don’t forget, multicast traffic only sends broadcast traffic across it’s own subnet. If you want broadcast traffic to pass through to other VLAN’s you’d likely need to enable ip broadcast forwarding so it can cross subnets into the realm’s you’re specifically requesting.

[Alistair]

Although we have 6 VLANS, everything we are talking about here is in the same VLAN-1 and physically connected to the same switch.
I’m not sure how to find out if multicast has been disabled or not. But it was not disallowed before, before we set up the VLANS.
Isn’t it normal by default to have multicast enabled in each VLAN?

Our gateways for all our VLANS are on a new PaloAlto PA-200 firewall. Not sure if that is creating a problem for multicast packets.
I’m looking at the PaloAlto user interface but cannot find any reference to multicast traffic yet.

But isn’t it normal by default to have multicast enabled in each vlan?

[BPSTravis]

That would depend on your device. As for finding the options, again… google searches will save your life…

We don’t mind helping out but you need to start searching for the basic info you are looking for especially when it’s related to your own hardware.

[Alistair]

[I]We don’t mind helping out but you need to start searching for the basic info you are looking for especially when it’s related to your own hardware. [/I]

Absolutely.

[Alistair]

The Cisco switch says: By default, all Multicast frames are flooded to all ports of the VLAN

Palo Alto - have not found any relevant info. The guy that helps me with the PaloAlto is uncontactable.

One thing is clear here - everything is in 1 broadcast domain, so it’s unlikely that multicasting has been filtered.

I’m stuck.

[Jaymes Driver]

I think you are chasing a ghost in the machines. You need to concentrate on a single issue and solve it before moving forward. And I doubt the firewall is the issue. The firewalls position is between your network and the world to act as a bouncer. Your fog server doesn’t send information to the world to come back to the network, it sits on the network and sends information on the local network ONLY, if your fog server is being passed through your firewall, something is wrong. Therefore it is highly unlikely that the firewall would cause the issue. NOW there could be a firewall installed in linux that could cause some issues, but I don’t think that pertains here.

Try eliminating the switch gear and attempt to image on a small hub or router (You will need something doling ip addresses to pxe boot) and try your set up on a few machines, if the multicast completes as expected you need to look at the settings in your network on your switch gear. If you have to set up a “test” environment on a few old hubs and try the set up, don’t use the main switches.

[Alistair]

I’m so tired and stressed out about this that I didn’t think of the obvious Jaymes that you did think of.
I did what you said.
fogserver, win server 2012, my PC and 2 clients (I used the win server because it was quicker - it had DHCP)

Same result, waiting for image… BUT.

Rebooted fogserver
TFTP …
Restarted tftpd-hpa

Then multitasking worked to the new PCs!!!
Have to go home now. Thanks Jaymes.

[Alistair]

Probably need to implement the delayed startup of TFTP that’s been mentioned earlier.
Obviously that will solve the TFTP … (waiting) on the clients.

But could there also be a connection between this and the image not being multicasted?

I hope a delayed startup of tftpd-hpa will also solve the multicast problem and eliminate the need to reboot fogserver.

When it comes to computers, I just seem to attract bugs and issues.
Computers are not impressed with my natural charm and charisma

[Alistair]

Tom I just read your comment from last year:
[I]Has anyone in this thread found this issue with 0.33b? Maybe I can append/sed the command into the installation so nobody has to worry about this! [/I]

Sounds like a good idea[I].[/I]

[Jaymes Driver]

For now I would do as you suggested, run a delayed start up of the command, or just restart the service on each reboot. You are welcome for the the suggestion, don’t feel bad when I get stressed about a fog issue someone else normally comes up with an easy test for me too, just paying it forward

[Alistair]

TFTP is still not running despite the mod to /etc/rc.local

Here is a copy of the file. Is there anything wrong?

#!/bin/sh -e

rc.local

This script is executed at the end of each multiuser runlevel.

Make sure that the script will “exit 0” on success or any other

value on error.

In order to enable or disable this script just change the execution

bits.

By default this script does nothing.

/bin/sleep30 && /etc/init.d/tftpd-hpa restart
exit 0

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

In order to enable or disable this script just change the execution

bits. (no idea what this means. Do I need to enable this script?)

[Alistair]

Multicast does not work again.

[Alistair]

Now it is working (multicast to the same 3 new PCs)

Trying to understand the sequence of events that leads to it not working and then working.

This time I rebooted fogserver, logged in, waited 2 minutes,
sudo stop tftpd-hpa
sudo start tftpd-hpa

From my PC - multicast to 3 PCs which worked

[Jaymes Driver]

I guess you will need to run the script yourself to stop and start the service, it’s not like it is a long command.

[Alistair]

I suspect Firefox or LibreOffice may be the culprits.
I know it is not good practise to use other programs on a dedicated server, but it makes it so much easier to to get this fog stuff done and sorted by using Firefox and LibreOffice on fogserver.

OK I am going to work through this systematically.
I am not touching the fogserver desktop. (remember I only logged in and then stopped and started tftpd-hpa.)
I am now multicasting again for a 2nd time succesfully to the 3 clients. To prove that it wasn’t a one off fluke. It can be repeated.

[Tom Elliott]

Shouldn’t the proper commands to restart the service be:
[code]sudo service tftpd-hpa restart[/code]

[Alistair]

Have now multicast the Ubuntu-12 image to the same classroom of old HPs - as expected did not work.
Then for the 3rd time I multicast Win 8.1 successfully to the 3 same new HPs.

3 successful multicasts of Win 8.1
1 failed multicast of Ubuntu to old HPs.

[Alistair]

Tom you wrote:

Shouldn’t the proper commands to restart the service be:
Code:
sudo service tftpd-hpa restart
I just realized that you are probably referring to the script used in rc.local? I thought you were commenting on when I wrote:

This time I rebooted fogserver, logged in, waited 2 minutes,
sudo stop tftpd-hpa
sudo start tftpd-hpa

I have now used the following line in rc.local, including sudo:

/bin/sleep30 && sudo /etc/init.d/tftpd-hpa restart

[Alistair]

Reboot
Log in window appears
Have not logged in.
Wait 1 minute.
Multicast to 3 PCs
TFTP… waiting
Cancel fog tasks
Log in to fogserver
Wait 1 minute
Multicast to 3 Pcs
TFTP…
Cancel fog tasks
sudo service tftpd-hpa restart
Multicast to 3 PCs
TFTP works
Multicast failed - same white window with blue frame
Cancel fog tasks

Reboot fogserver
Log in
wait 1 minute
sudo service tftpd-hpa restart
Multicast to 3 PCs
Multicast failed !!! (strange, I thought this would work now)
Cancel fog tasks

Reboot fogserver
Log in
wait 1 minute
sudo service tftpd-hpa restart
Multicast to 3 PCs
Multicast failed again !!!
Cancel fog tasks

Reboot fogserver
Log in
wait 1 minute
sudo stop tftpd-hpa
sudo start tftpd-hpa
Multicast to 3 PCs
Multicast Worked (note that this time I stopped tftp first and then started it 10 seconds later)

I am now going to reboot fogserver and repeat the above procedure 2 more times to confirm working with stop and then start.