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mayank7489's avatar
mayank7489
Aspirant
Nov 03, 2017
Solved

Multicast stops working after about 20 minutes

Hello Everyone...   We have the following setup..   1 x XSM7224S-100AJS (M7300) running 9.0.1.42 acting as a Core 2 x M4300-52G ProSAFE 48-port 1G and 2-port 10GBASE-T and 2-port 10G SFP+ acting...
Troubleshooting
  • mayank7489's avatar
    mayank7489
    Nov 29, 2017

    Hi Hopchen,

     

    Apologies for the late reply...

     

    Bascially this is the update...

     

    Did everything recommended except the below item 3 as this option was not in my Core.. 

     

    3. Allow querier mode each VLAN.
    Switching > Multicast > IGMP Snooping > IGMP VLAN Configuration > Enable Proxy Querier mode for you VLANs here and click Apply.

     

    The site just confirmed that multicast is working fine now... :)

     

    One thing I should mention that when I changed the multicast protocol, my remote connection dropped out for about 30 seconds... But then it came good.

     

     Thanks you very much for your help on this...

     

    Regards,

    Mayank 

     

     

Hopchen's avatar
Hopchen
Prodigy
Nov 07, 2017

Hey,

 

From what I understand, there is one routing hop in the network - your core switch. In that case, I would suggest to use PIM-DM instead. Also, the DVMRP config isn't quite right and that might be the issue. You only need mcast routing on the devices that is actually does the routing.

 

Second thing is the IGMP snooping querier being enabled on multiple switches. That is fine, but you need to make sure they are enabled for querier election mode then.

I have attached some documents to this thread. Download via this link:

http://files.netgear-support.com/go/?a=d&i=xTXv5kPxjA

Please have a read. These are home-made but they will explain it a bit more. The link will expire in 10 days.

 

So, my advise:
1. Turn off DVMRP on all switches.
2. Use PIM-DM on just the routing core.
3. Review IGMP snooping setup according to my document. You might not need to change anything here.


Any questions, let me know!


Cheers

mayank7489's avatar
mayank7489
Aspirant
Nov 08, 2017

Hi Hopchen,

 

Thanks for replying. much appreciated.

 

Let me digest and get back to you.

 

Regards.

 

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