Foundry NetIron M2404C and M2404F Metro Access Switches
Configuring Multicast Layer 2 (Rev. 03)
Multicast VLAN Registration (MVR)
© 2008 Foundry Networks, Inc.
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Figure 7: Example of a Layer 2 MVR Configuration
This setup allows cross-VLAN multicast frames to be sent from VLAN 2 to users on other VLANs
through registered receiver ports.
Immediate Leave
If Immediate Leave is enabled on a receiver port, the port leaves a multicast group more quickly.
Without Immediate Leave, when the device receives an IGMP leave message from a subscriber on
a receiver port, it sends out an IGMP query on that port and waits for IGMP group membership
reports. If no reports are received within a configured time period, the receiver port is removed
from multicast group membership. With Immediate Leave, an IGMP query is not sent from the
receiver port on which the IGMP leave was received. As soon as the leave message is received, the
receiver port is removed from multicast group membership, which speeds up leave latency. By
default the Immediate Leave is enabled. To change the Immediate Leave status, use the
mvr
immediate
command in Interface Configuration mode.
MVR Configuration Flow
The following flow chart shows the process of configuring the MVR parameters.