Alcatel-Lucent AOS-W 6.5.3.x - Page 682

682| IP Mobility AOS-W 6.5.3.x| User Guide
multicast traffic from the roaming client is sent to the local switch over an L2 GRE tunnel. The remote switch
will receive downstream multicast traffic and send it to the mobile client.
The L2-GRE Tunnel implementation of the IP mobility functionality is supported only on AOS-W versions 6.2 or later,
and is not backward compatible with the earlier implementation. AOS-W supports only v4 mobility and does not
support IPv6 L3 mobility.
Meanwhile, the local switch checks to see if other local clients require group1 traffic. If no other clients are
interested in group1, then the local switch will leave that group. If there are other clients using that group,
the switch will continue its group1 membership.
3. Now the mobile client leaves remote switch A and roams to VLAN 100 on remote switch B. Remote switch B
locates the mobile client's local switch and learns about the client's multicast groups. Remote switch B then
joins group1 on behalf the roaming mobile client 1, using its VLAN 100 IP address.
Both the local switch and remote switch A will verify if any of their other clients require group1 traffic. If
none of their other clients require group1, then that switch will leave the group. (If the local switch leaves
the group, it will also notify remote switch A.) If either switch has other clients using that group, that switch
it will continue its group1 membership.
Configuring Mobility Multicast
To enable IGMP and/or IGMP snooping on this interface, or configure a VLAN interface for uninterrupted
streaming of multicast traffic:
In the WebUI
1. Navigate to the Configuration > Network > IP window.
2. Click Edit by the VLAN interface for which you want to configure mobility multicast. The Edit VLAN window
opens.
3. Select Enable IGMP to enable the router to discover the presence of multicast listeners on directly-attached
links.
4. Select Snooping to save bandwidth and limit the sending of multicast frames to only those nodes that
need to receive them.
5. Select the Interface checkbox, then click the Proxy drop-down list and select the switch interface, port and
slot for which you want to enable proxy IGMP.
6. Click Apply.
7. (Optional) Repeat steps 1-6 above to configure mobility multicast for another VLAN interface.
In the CLI
interface vlan <vlan>
ip igmp proxy [{fastethernet|gigabitethernet} <slot>/<module>/<port>]|[snooping]
Parameter Description
fastethernet
Enable IGMP proxy on the FastEthernet (IEEE 802.3) interface
gigabitethernet
Enable IGMP proxy on the GigabitEthernet (IEEE 802.3) interface
<slot>/<module>/<port>
Any command that references a Fast Ethernet or Gigabit Ethernet
interface requires that you specify the corresponding port on the switch in
the format <slot>/<module>/<port>.
Table 151: Command Syntax