Ip Multicast Ttl-Threshold - Dell Networking 2024 Reference Manual

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Default Configuration

This command has no default configuration.

Command Mode

Global Configuration mode

User Guidelines

Use of a multicast routing protocol is recommended (e.g., PIM, when ip

multicast is enabled).

Unless required, IGMP/MLD snooping should be disabled when ip multicast

is enabled. If a multicast source is connected to a VLAN on which both L3

multicast and IGMP/MLD snooping are enabled, the multicast source is

forwarded to the mrouter ports that have been discovered when the multicast

source is first seen. If a new mrouter is later discovered on a different port, the

multicast source data is not forwarded to the new port. Likewise, if an existing

mrouter times out or stops querying, the multicast source data continues to

be forwarded to that port. If a host in the VLAN subsequently joins or leaves

the group, the list of mrouter ports is updated for the multicast source and

the forwarding of the multicast source is adjusted. The workaround to this

limitation is to statically configure mrouter ports when enabling IGMP/MLD

snooping in L3 multicast enabled VLANs.

This command is not affected by enabling/disabling PIM or DVMRP .

This command enables both ipv4 and ipv6 multicast routing.

The following example enables IP multicast on the router.

console#configure

console(config)#ip multicast

ip multicast ttl-threshold

Use the ip multicast ttl-threshold command in Interface VLAN

Configuration mode to apply a

to a routing interface.

TTL threshold which is applied to the multicast Data packets forwarded

through the interface.

Multicast Commands

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