@george1421 said in Multicast very slow:
Do you have the capabilities to run a second network wire from the switch where the fog server is to the switch where the target computers are? (I’ll explain more if you can).
It’s quiet already the case
The switch (OS6250) where are connected all my target computers is just below the switch where the fog server is (OS6450).
And directly connected by a 1GB link
Then, only target computers are on a 100MB link
@george1421 For these tests for the moment i’ve no time enough but i’ll do these tests in a near futur
@george1421
I’m not sure to well understand
Actually my diagram is not “really” true.
The fog server is on a GB port
All desktop clients are on 100 M ports
I cant do anything else, no enough GB ports
@george1421
With a target computer far from the fog server it seems to works also
file:///home/pascal/Bureau/multicast-205.jpg
@george1421
To answer to your last question it was a session with 15 target computer and theses target computer was very near the fog server, on my drawing it’s the swith just below the fog server
With only one computer it seams to works fine.
Unicast
file:///home/pascal/Bureau/unicast.jpg
Multicast
file:///home/pascal/Bureau/multicast.jpg
@george1421
Image menu
Multicast Image
Start Multicast Session
@george1421 Sorry but where is this “Start Multicast session” ?
@george1421 How can i make multicast on 1 computer? I can’t see this option
@george1421
unicast : 30minutes for 14 Computers
multicast : 24hours for the same computers
For information i’ve got these kinds of logs :
http://plegrand1.free.fr/multicast.log.udpcast.6
unicast works fine
@Sebastian-Roth
Hello Sebastian and thanks for your answer.
I made these tests (sorry for the french words) :
Troubleshoot MultiCast
https://wiki.fogproject.org/wiki/index.php/Multicasting
Afficher le mode debug sur les clients
Menu Fog Configuration
iPXE Menu Item Settings
fog.debug
L’option “Menu Show with” est par défaut sur “Debug Options”. La mettre sur “All hosts”
Test avec 4 clients
Sur le serveur, lancer la commande suivante :
udp-sender --file /opt/fog/.fogsettings --log /opt/fog/log/multicast.log --ttl 32 --nopointopoint
Sur les clients
Booter en mode debug
Commande : udp-receiver
Sur le serveur, on doit voir les 4 clients connectés
“Enter” pour lancer le transfert
Sur le serveur
“Enter” pour lancer le transfert
Tests avec les postes:
192.168.39.181
192.168.39.145
192.168.39.121
192.168.39.189
Multicast litening : 232.168.39.243
Logs sur le serveur :
New connection from 192.168.39.181 (#0) 00000009
Ready. Press any key to start sending data.
New connection from 192.168.39.145 (#1) 00000009
Ready. Press any key to start sending data.
New connection from 192.168.39.189 (#2) 00000009
Ready. Press any key to start sending data.
New connection from 192.168.39.121 (#3) 00000009
Ready. Press any key to start sending data.
094 re-xmits=0000002 (100.0%) slice=0112 - 0
09:24:59.309910 Using mcast address 232.168.39.243
09:24:59.309962 UDP sender for /opt/fog/.fogsettings at 192.168.39.243 on eth0
09:24:59.309973 Broadcasting control to 192.168.39.255
09:25:03.709692 Using mcast address 232.168.39.243
09:25:03.709744 UDP sender for /opt/fog/.fogsettings at 192.168.39.243 on eth0
09:25:03.709756 Broadcasting control to 192.168.39.255
09:30:03.457992 Using mcast address 232.168.39.243
09:30:03.458037 UDP sender for /opt/fog/.fogsettings at 192.168.39.243 on eth0
09:30:03.458047 Broadcasting control to 224.0.0.1
10:13:28.830979 Starting transfer: 00000009
10:13:28.842773 RETX 1 1
10:13:28.843867 RETX 2 1
10:13:28.844919 Transfer complete.
10:13:28.845001 Disconnecting #0 (192.168.39.181)
10:13:28.845050 Disconnecting #1 (192.168.39.145)
10:13:28.845063 Disconnecting #2 (192.168.39.189)
10:13:28.845075 Disconnecting #3 (192.168.39.121)
10:13:28.845090
For me it works fine. What do you think about that?
Hello,
i’m trying multicast with fog 1.5.5 and alcatel switchs (OS6250 and OS6450).
When i launch a multicast session it’s extremely slow.
For the configuration of the switchs i made like this :
On all switchs enable igmp globaly and on vlan 2 (fog server)
ip multicast status enable
ip multicast vlan 2 status enable
ip multicast zapping enable
ip multicast vlan 2 zapping enable
ip multicast version 3
ip multicast vlan 2 version 3
ip multicast querier-forwarding enable
ip multicast vlan 2 querier-forwarding enable
On the querier switch (the closest to the fog server)
ip multicast querying enable
ip multicast vlan 2 querying enable
ip interface Querier address 192.168.39.244 mask 255.255.255.0 vlan 2
Disable igmp on all other vlans on all the switchs
All computers are on 100M port and the fog server on 1G port
You can see on this diagram http://plegrand1.free.fr/IGMP.png (old diagram )
not a ghost server but a fog server
I add global statement
The server is on a 1G port
the flow is very fast at the beginning then goes down to be very slow (25M / min)
Here is the server characteristics
PowerEdge T310
Intel(R) Xeon(R) CPU X3480 @ 3.07GHz
cores = 4
enabledcores = 4
threads = 8
Ram = 32GiB
Ethernet interface
NetXtreme II BCM5716 Gigabit Ethernet
eth0
1Gbit/s
Could you help me to solve this problem ?
@george1421 As i’m behind a proxy i think there is a problem to download kernel from web interface.
But proxy is configured in FOG settings; Proxy Settings
Then i followed this :
cd /var/www/fog/service/ipxe
mv bzImage bzImage.orig
wget https://fogproject.org/kernels/bzImage
mv bzImage32 bzImage32.orig
wget https://fogproject.org/kernels/bzImage32
mv init.xz init.xz.orig
wget https://fogproject.org/inits/init.xz
mv init_32.xz init_32.xz.orig
wget https://fogproject.org/inits/init_32.xz
It’s the latest kernel !!
Is it OK for you?
Thanks a lot again.
@george1421 Thanks a lot for your help
if you didnt see that :
with the 1.5.4 version the local uefi boot works fine !!!
@george1421 Just updated…
local boot uefi works fine
Great !!!
@george1421
Can you explain me how you do that ?
Kernel 4.15.2 and php-fpm config file
@george1421
No problem 
i saw that there was some problem : Erasing current MBR/GPT tables.
If i follow this everything will work fine :
https://forums.fogproject.org/topic/12370/it-takes-longer-time-more-than-5-minutes-erasing-current-mbr-gpt-tables/15
thanks for your help
@george1421
In fact here is the situation.
The only problem i have is with uefi local boot.
i tried Exit Sanboot REFIND_EFI without success.
Is there a way to solve that?
@george1421
Hello,
i found this in the forum:
https://forums.fogproject.org/topic/12115/dell-optiplex-3050-avec-windows-10-uefi/6
Then i made a try by modify the “/var/www/fog/service/ipxe/refind.conf” file
# scanfor internal,hdbios
Now it works :
After the PXE boot menu
It display refind logo
then it display "Pausing before disk scan; please wait…
It display 2 time dell logo
at the third time : It launch windows 10.
Could you explain me why :
# scanfor internal,hdbios
Thanks for your help