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February 16th, 2024 00:27
Forwarding IGMP join frames with snooping enabled
Is it possible to forward IGMP join frames when snooping is enabled on the switch? For example, a join frame is received on port Te1/0/1 tagged with VLAN 602. I want that frame forwarded to port Gi1/0/2. Both are members of VLAN 602.
I thought if I disabled snooping for VLAN 602, because I don't actually need snooping for that VLAN, that this might allow the frame to go through. But it does not appear to be the case. Is there something else I can try?
This is with a Dell N2048 running Version 6.7.1.6
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DELL-Joey C
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February 16th, 2024 08:20
Hi,
You will need snooping enabled for it to be forwarded to the specific port Gi1/0/2.
JasonQG
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February 16th, 2024 18:09
@DELL-Joey C That is the exact opposite of what I'm seeing
DELL-Chris H
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February 16th, 2024 18:28
JasonQG,
Based on your original posting, you may want to consider Multicast Vlan Registration, as seen on page 973 here.
Let me know if this helps.
JasonQG
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February 16th, 2024 22:17
@DELL-Chris H Could this be used with multiple destinations for the join frames? I had simplified things a bit in my explanation, so let me expand now. There are multiple ports where the join frames should go, each on a different VLAN. So in addition to join frames received at Te1/0/1 with VLAN 602 going to Gi1/0/2, a join frame with VLAN 629 would, for example. go to Ge1/0/29.
From my reading of the documentation, it doesn't seem like this is supported by Multicast Vlan Registration, but maybe I'm misunderstanding something.
DELL-Erman O
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February 19th, 2024 08:01
Hi, in your case, where you have multiple destinations for the join frames each on a different VLAN, it seems like a more complex scenario. While MVR can help distribute multicast streams across different VLANs, it might not fully support your specific use case. It would be best to consult with a network engineer contacting your local Dell support.