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jic5760
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CSS326 IGMP Snooping not working!

Thu Aug 02, 2018 1:15 am

I am using a CSS326 switch.
I have configured IGMP Snooping on VLAN90.
However, multicast seems to be broadcast.
The SwOS version is 2.8 and is the same in 2.7.

Port stat
sw.png
IGMP snooping
sw2.PNG
After changing the IPTV channel, the screen will not appear for about 2 minutes and then it will come out.

What should I check?
Is it a bug in Mikrotik?
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gregecslo
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Re: CSS326 IGMP Snooping not working!

Sun Sep 02, 2018 10:04 am

Same here, iptv uplink will flood all ports even when igmp snooping is ON and enabled on vlan.
I had to create separate vlan just for tv`s....
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teslasystems
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Re: CSS326 IGMP Snooping not working!

Sat Oct 13, 2018 11:11 pm

Hello!
I have a little different issue. When IGMP snooping is disabled, everything works as it should, multicast packets flood to all ports and IPTV works well. But when I enable this option, IPTV doesn't works at all! I can see IPTV members on IGMP tab, but no any multicast traffic is going through the switch to IPTV member. My switch has a default configuration, no any VLANs or other settings were changed, just enabled the IGMP snooping option on System tab.
Is it an issue or I'm doing something wrong?
 
jic5760
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Re: CSS326 IGMP Snooping not working! [I think I found the cause!]

Sun Oct 14, 2018 6:53 pm

I think I found the cause!
Next post : viewtopic.php?f=17&t=140408&p=692454
 
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davides
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Re: CSS326 IGMP Snooping not working!

Fri Oct 19, 2018 12:00 pm

The same happens to me
I have configured IGMP Snooping on CSS
In igmp tab I can see all port where IGMP join packet are received
BUT anyway multicast is flooded as broadcast on all running interfaces...
 
jic5760
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Re: CSS326 IGMP Snooping not working!

Sat Oct 20, 2018 4:44 am

The same happens to me
I have configured IGMP Snooping on CSS
In igmp tab I can see all port where IGMP join packet are received
BUT anyway multicast is flooded as broadcast on all running interfaces...
What your firmware version?
My problem occurs in version 2.8.
 
sasskass
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Re: CSS326 IGMP Snooping not working!

Wed Jan 23, 2019 12:31 am

Hi,

Same issue on CSS326

For the tesing we setup pim and monitored what is going on > From the pim side we see that the quereis are coming, but from source with the 0.0.0.0/0 address but must be unicast.

Impossible to define multicast router port, and the queries are not passing the source ip so igmp function is useless.

Aleksander
 
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teslasystems
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Re: CSS326 IGMP Snooping not working!

Mon Feb 04, 2019 9:46 pm

Hoped to see some changes in 2.9, but the problem is not solved :(
I have attached the drawing of my network setup to clarify the situation. There are two CSS326 switches and one CCR1009 router. The router is connected to the internet provider with IPTV. The switches are connected between with 10G optical cable and one of them is connected to the router (also with 10G cable). IGMP snooping on the router is enabled, but it doesn't affects on my problem. When IGMP snooping on both switches is disabled, everything works and IPTV clients can watch their TV channels. But if I enable IGMP snooping on any switch (or both of them), everything brokes and no one can watch TV. The most strange thing is that if I enable IGMP snooping on "Switch 1", IPTV stops working on "Client 3" and "Client 4" ! I don't see any adequate explanation of such behavior... And when I disable IGMP snooping on switches, it takes about 5 minutes to everything become working again, it's also very strange.
Can anyone explain what's happening here?
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