User's Manual

512
Command Purpose
ip multicast ttl-threshold
ttl-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
72.4 Configuring IP Multicast Boundary
Run the command ip multicast boundary to configure the multicast boundary for the port. Run the command
no ip multicast boundary to cancel the configured boundary. The commands used in the second
configuration will replace the commands used in the first configuration.
Command Purpose
ip multicast boundary
access-list Configures the multicast boundary for the port.
Example
The following example shows how to configure the management boundary for a port:
interface ethernet 0/0
ip multicast boundary acl
ip access-list standard acl
permit 192.168.20.97 255.255.255.0
72.5 Configuring IP Multicast Helper
Run the command ip multicast helper-map to use the multicast route to connect two broadcast networks in
the multicast network. Run the command no ip multicast helper-map to cancel the command.
Command Purpose
interface
type number Enters the interface configuration mode.
ip multicast helper-map broadcast
group-
address access-list
Configures the command
ip multicast helper
to convert the broadcast message to the
multicast message.
ip directed-broadcast
Allows the directional broadcast.
ip forward-protocol
[port]
Configures the port number allowing to forward
the message.
On the last-hop router connecting the destination broadcast network, perform the following operations:
Command Purpose
interface
type number Enters the interface configuration mode.
ip directed-broadcast
Allows the directional broadcast.
ip multicast helper-map
group-address
broadcast-address access-list
Configures the command
ip multicast helper
to convert the multicast message to the