The IGMP proxy and IGMP snooping functionalities cannot be enabled on the same VLAN simultaneously.
Configuring SSM Range
You can configure the SSM range by using the CLI and WebUI.
In the WebUI
1. Navigate to Configuration > Network > IP > Multicast Routing page of the WebUI.
2. In the IGMP tab, enter values for SSM Range in the SSM Range Start-IP and SSM Range Mask-IP text
boxes.
3. Click Apply.
The proxy operation will be downgraded to IGMPv2 if any lower version clients are present and reverts back to v3
mode if the switch finds no lower version client joins (reports) for a specified interval of time. In the downgraded
proxy operation the SSM semantics is not applicable for the particular VLAN.
In the CLI
(host)(config) # ip igmp
(host)(config-ip)# ssm-range <startip> <maskip>
Working with Inter Switch Mobility
When a client moves from one switch to another, multicast traffic migrates as follows:
Figure 91 Inter-Switch Mobility
1. The local switch uses its VLAN 10 IP address to join multicast group1 on behalf of a mobile client.
2. The mobile client leaves its local switch and roams to VLAN 50 remote switch A.
Remote switch A locates the mobile client's local switch and learns about the client's multicast groups.
Remote switch A then joins group1 on behalf the mobile client, using its VLAN 50 source IP. Upstream
AOS-W 6.5.3.x | User Guide IP Mobility | 681
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