Multicast issue - IGMP on switches (HP)

[george1421]

Is the fog server and the target computers on the same IP subnet?

[Flavalf]

As I’m not a specialist, yes they are : fogserver is 172.16.1.111 and the dhcp range is
172.16.13.0 to 172.16.16.255. the dhcp server is a windows 2012 server

[george1421]

@Flavalf What is your subnet mask for both the fog server and the dhcp range. The reason why I ask is that there is a potential for the FOG server to be on another subnet (vlan) than your dhcp clients.

FOG server
172.16.1.111

dhcp range
172.16.13.0 to 172.16.16.255

If your subnet mask is something like 255.255.0.0 then what you’ve posted is correct. What I’m trying to understand is if there is a router between the clients and the FOG server. FOG-casting on the same subnet shouldn’t be a problem between subnets then you might have an issue.

[Flavalf]

On server :

root@fogserver:~# ifconfig
eth0      Link encap:Ethernet  HWaddr 44:37:e6:62:7c:8f
          inet adr:172.16.1.111  Bcast:172.16.255.255  Masque:255.255.0.0
          adr inet6: fe80::4637:e6ff:fe62:7c8f/64 Scope:Lien
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:45004809 errors:0 dropped:4 overruns:0 frame:0
          TX packets:3727057 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:1000
          RX bytes:3524256236 (3.2 GiB)  TX bytes:126333435337 (117.6 GiB)
          Interruption:17

lo        Link encap:Boucle locale
          inet adr:127.0.0.1  Masque:255.0.0.0
          adr inet6: ::1/128 Scope:Hôte
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:122881 errors:0 dropped:0 overruns:0 frame:0
          TX packets:122881 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:0
          RX bytes:14737940 (14.0 MiB)  TX bytes:14737940 (14.0 MiB)

On client ( in debug task) :

[Flavalf]

Test with 1 client :

multicast.log

[05-23-17 8:01:32 pm] * No tasks found!
[05-23-17 8:01:22 pm] * No tasks found!
20:01:12.912924 
20:01:12.912855 Transfer complete.
20:01:12.909402 Disconnecting #0 (172.16.13.207)
20:01:12.598314 Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000
[05-23-17 8:01:12 pm] * No tasks found!
20:01:06.531724 Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000
[05-23-17 8:01:02 pm] * No tasks found!
20:01:00.465126 Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000
20:00:54.398543 Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000
[05-23-17 8:00:52 pm] * No tasks found!
20:00:48.331956 Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000
20:00:42.265365 Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000
[05-23-17 8:00:42 pm] * No tasks found!
20:00:40.198868 Timeout notAnswered=[0] notReady=[0] nrAns=0 nrRead=0 nrPart=1 avg=10000
20:00:40.108834 Starting transfer: 00000009
[05-23-17 8:00:32 pm] * No tasks found!
20:00:24.781281 Broadcasting control to 172.16.255.255
20:00:24.781257 UDP sender for /opt/fog/.fogsettings at 172.16.1.111 on eth0 
20:00:24.781134 Using mcast address 236.16.1.111

On server and client :

[george1421]

@Flavalf I just chatted with one of the devs and he recommended that you test the 1.4.1RC0 inits. There was a fix put into those inits to address a multicasting issue. Your issue sounds similar.

https://fogproject.org/inits/init.xz
https://fogproject.org/inits/init_32.xz

Download those and replace the ones on the fog server in /var/www/html/fog/service/ipxe directory.

[Flavalf]

I’ve replaced the files in /var/www/html/fog/service/ipxe ( no need to reboot I guess ? )
I’ve rebooted the client and … get the same issue
I don’t know if it’s normal or not but I can’ t ping 224.0.0.1 from the client :

[Flavalf]

Hi, feedback on my issue : it was ( as usual ) a network cause.
IGMP was enable on switches but no switch was querier and no multicast group has been set.

Now , the 1 client test is ok, I can go further and make it works !
Thanks for support.

[Sebastian Roth]

@Flavalf Thanks for keeping us posted on this. This is very helpful information for others having issues with multicast!

[Flavalf]

@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 !