PIM6 SM snooping configuration
•All the device ports connected to the source and receivers or routers must be in the same port- based VLAN.
•The PIM6 SM snooping feature assumes that the group source and the device are in different subnets and communicate through a router. The source must be in a different IP subnet than the receivers. A PIM6 SM router sends PIM join and prune messages on behalf of a multicast group receiver only when the router and the source are in different subnet. When the receiver and source are in the same subnet, they do not need the router in order to find one another. They find one another directly within the subnet.
The device forwards all IP multicast traffic by default. Once you enable MLD snooping and PIM6 SM traffic snooping, the device initially blocks all PIM6 SM traffic instead of forwarding it. The device forwards PIM6 SM traffic to a receiver only when the device receives a join message from the receiver. Consequently, if the source and the downstream router are in the same subnet, and PIM6 SM traffic snooping is enabled, the device blocks the PIM6 SM traffic and never starts forwarding the traffic. This is because the device never receives a join message from the downstream router for the group. The downstream router and group find each other without a join message because they are in the same subnet.
NOTE
If the
PIM6 SM snooping configuration
Configuring PIM6 SM snooping on a Brocade device consists of the following global and
Perform the following global PIM6 SM snooping task:
•Enabling or disabling PIM6 SM snooping
Perform the following
•Enabling PIM6 SM snooping on a VLAN
•Disabling PIM6 SM snooping on a VLAN
Enabling or disabling PIM6 SM snooping
Use PIM6 SM snooping only in topologies where multiple PIM sparse routers connect through a device. PIM6 SM snooping does not work on a PIM dense mode router which does not send join messages and traffic to PIM dense ports is stopped. A PIM6 SM
Perform the following steps to enable PIM6 SM snooping globally.
1.Enable MLD snooping passive globally. device(config)#ipv6 multicast passive
2.Enable PIM6 SM snooping globally. device(config)#ipv6
This command enables PIM6 SM traffic snooping. The PIM6 SM traffic snooping feature assumes that the network has routers that are running PIM6 SM.
FastIron Ethernet Switch IP Multicast Configuration Guide | 65 |
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