Topics created by Flavalf

alt textGood news everyone !

One more time, FOG was not faulty but the NETWORK …
After checking again Forums on multicasting and similar problems, I’ve found the solution :

The querier switch must have an IP adress on the subnet …

Once I’ve made the change, I tested a 4 client multicast session : total success !
So I tried with a classroom of 19 clients : in 30 min ( 1.5Gbps/min, max speed with 100Mbits connections ), all images were downloaded !

So, maybe it would be interesting for others to include these advices in the wiki or the troubleshooting Multicast page :

enable IGMP snooping on VLAN concerned in all switches

Choose 1 "master switch ( for me the all gigabit one under fogserver ) and make the following only for this one :

assign an IP adress to the VLAN in the switch configuration in the subnet range enable IGMP query on the VLAN verify the switch has Active Group Addresses Enjoy !!!

Thanks again at all the FOG team

Nothing changed in regards to that. I suspect, however, it was related to a ton of “slashes” that made the query larger than it could be to actually perform the update.

@Sebastian-Roth You’re welcome …
For info, my switches are HP Procurve and I used these links to configure them !

https://community.spiceworks.com/how_to/26481-enable-igmp-on-hp-procurve

http://whp-hou9.cold.extweb.hp.com/pub/networking/software/AdvTraff-Oct2005-59908853-Chap04-IGMP.pdf

Now, Multicast is working properly : I imaged 3 clients at 1.4 Gb/min, next I will try 10 or more !

So here is just a feedback : you were totally right !
The problem causes now very low speed while imaging on some machines ( record : 22 MB/min !!! ) and as soon as I connect the machine on another switch, the speed increase frankly. I’m not victorious because I didn’t isolate the faulty swith ( there are many interconnected … ) even if I suspect one ( but reboot it doesn’t change anything.
So I don’t bother you and ask more as it is clearly a network issue and not a FOG one, but when I found a solution ( I hope so … )
I will post it here …

Thank you again !

[quote=“Flavalf, post: 30776, member: 24625”]Thank you Jaymes for your answer, I see there is plenty of messages claiming the team’s help on the forum and it’s not the best part of the job to answer and debug users … but it’s the price of fame.;)

I have to say, my point was not to blame FOG, I never thought the cause was the program.
You know, I’m just a teacher who is in charge ( with small time … ) of the network of my college ( nearly 400 Pcs ), and I just want with my poor knowledges to learn how it works and how it can works better !
For sure, using FOG is already a great gain of time and headache for me and I thank you guys again.

So, I will investigate my network as you told me and give feedback as i can.[/quote]

I wasn’t trying to say you were claiming a bug per say, but then it could be! We change and break things often! So run some of these test on an isolated network and see if that helps to increase your imaging speeds. If not we can work from there!

Thanks for being understanding, and good luck!