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i found the anwer for this question, just wanted to share with other:<br />
<br />
It will become available once the port &nbsp;is set to access mode
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i found the anwer for this question, just wanted to share with other:

It will become available once the port  is set to access mode

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<div class="content wysiwyg-content">
Customer has Cisco Catalyst WS-C2960-24TT-L; he is using IP IGMP in the configuration.<br />
Customer did IOS upgrade to the switch to version: c2960-lanbasek9-mz.122-40.<wbr />SE, and know he is not able to <br />
use the following command ip igmp max-groups, under the interface configuration. It was working before the<br />
&nbsp;upgrade for &nbsp;the customer.
</div>
</div>


Customer has Cisco Catalyst WS-C2960-24TT-L; he is using IP IGMP in the configuration.
Customer did IOS upgrade to the switch to version: c2960-lanbasek9-mz.122-40.SE, and know he is not able to 
use the following command ip igmp max-groups, under the interface configuration. It was working before the
 upgrade for  the customer.

2950 &quot;ip igmp max-groups&quot; commands

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A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.

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2950 &quot;ip igmp max-groups&quot; commands

2950 "ip igmp max-groups" commands