User Manual

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Users Manual of XGS-6350-24X4C
50.2.2.2 Starting up PIM-SM
To run PIM-DM on a port and activate the PIM-DM multicast, perform the following operation:
Command Purpose
ip pim-sm
Enters a port where PIM-SM needs to run and then
activates the PIM-SM multicast routing process in
port configuration mode.
50.2.3 Configuring TTL Threshold
Run the command ip multicast ttl-threshold to configure the TTL threshold of the multicast message that is
allowed to pass the port. Run the command no ip multicast ttl-threshold to use the default threshold value
1.
Command Purpose
ip multicast ttl-thresholdttl-value
Configures the TTL threshold on the
port.
Example
The following example shows how the administrator configures the TTL threshold on a port:
interface ethernet 1/0
ip multicast ttl-threshold 200
50.2.4 Cancelling Rapid Multicast Forwarding
Run the command ip multicast mroute-cache to configure the rapid multicast forwarding function on a port.
Run the command no ip multicast mroute-cache to cancel the rapid multicast forwarding function.
Command Purpose
ip multicast mroute-cache
Enables the rapid multicast forwarding
function on a port.
Example
The following example shows how the administrator cancels the rapid multicast forwarding function on a port:
interface ethernet 1/0
no ip mroute-cache
50.2.5 Configuring Static Multicast Route
The static multicast route allows that the multicast forwarding path is different from the unicast path. RPF
check is performed when the multicast message is forwarded. The actual port receiving the message is the
expected receiving port. That is, the port is the next-hop port of the unicast route that reaches the sender. If
the unicast topology is same to the multicast topology, RPF check is reasonable. In some cases, the unicast
path requires to be different from the multicast path.