IGMPv3 source specific l2 forwarding

[Andreas Reimann]

Hi there

Does Cisco Switches Support a Feature to flood multicast traffic specific on a given source

Assumption

Client A an Vlan A sends IGMPv3 Join for Group A from Source A

Client B an Vlan A sends IGMPv3 Join for Group A from Source B

Client A should not receive traffic from Source B and Vice versa

The Output for igmp Groups on Cisco shows no source address specific Information, while Huawei does. Problem is that outgoing Interface can easily be overloaded with traffic not required by the Client.

Most probably Huawei goes beyond RFC specification, can Cisco do that as well and on what HW/SW?

show ip igmp snooping groups

Vlan      Group                    Type        Version     Port List

-----------------------------------------------------------------------

816       232.255.4.128            igmp        v3          Gi1/0/18, Gi1/0/48,

                                                           Te1/0/2

816       232.255.7.128            igmp        v3          Gi1/0/13, Gi1/0/14,

                                                           Gi1/0/35, Gi1/0/36,

                                                           Gi1/0/41, Gi1/0/43,

                                                           Te1/0/2

display igmp group static

Static join group information

Total 2 entries, Total 2 active entries

Group Address     Source Address    Interface   Expires

225.0.0.10        0.0.0.0           Loop1       never

232.1.1.20        10.0.0.1          Vlanif3     never

[Rich Uline]

Andreas,

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The Output for igmp Groups on Cisco shows no source address specific Information

If you issue the command 'sh ip igmp group', you should see the source IP address.

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Client A should not receive traffic from Source B and Vice versa

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Client A and Client B are in the same VLAN. Therefore they should and will receive all multicast traffic sent by the other.

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Problem is that outgoing Interface can easily be overloaded with traffic not required by the Client.

This is a something you will have to consider when designing your network to support multicast. If the multicast application(s) require more bandwidth, then you need to design accordingly.

Also, I'd like to invite you to take a look at this multicast explanation which I recently read. I think it might help you.

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[Andreas Reimann]

Hi

I‘m aware about theoretical basics, i‘m asking because another switch vendor implemented that feature. The question was, if Cisco products also allow L2 port filtering of multicast based on source IP
The answer can be yes or or no.
Thank you
Andy