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Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
Usage
Information
This feature allows you to limit the number of multicast entries on the system. This number is the total of
all the multicast entries on all line cards in the system. On each line card, the multicast module only installs
the maximum number of entries, depending on the configured CAM profile.
To store multicast routes, use the IN-L3-McastFib CAM partition. It is a separate hardware limit that
exists per port-pipe. This hardware space limitation can supersede any software-configured limit. The
opposite is also true, the CAM partition might not be exhausted at the time the system-wide route limit
set by the ip multicast-limit command is reached.
ip multicast-routing
Enable IP multicast forwarding.
Syntax
ip multicast-routing
To disable multicast forwarding, use the no ip multicast-routing command.
Defaults Disabled.
Command Modes CONFIGURATION
Supported Modes Full–Switch
Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
Usage
Information
After you enable multicast, you can enable IGMP and PIM on an interface. In INTERFACE mode, enter the
ip pim sparse-mode command to enable IGMP and PIM on the interface.
Related
Commands
ip pim sparse-mode — enables IGMP and PIM on an interface.
mtrace
Trace a multicast route from the source to the receiver.
Syntax
mtrace [vrf vrf-name] {source-address/hostname} [destination-address/
hostname] [group-address/hostname]
Parameters
vrf vrf-name Enter the keyword vrf followed by the name of the VRF. If VRF name is not
mentioned, the default VRF will be used. Mtrace is not supported for management
VRF.
source-address/
hostname
Enter the source IP address in dotted decimal format (A.B.C.D). This is a unicast
address of the beginning of the path to be traced.
destination-
address/
hostname
Enter the destination (receiver) IP address in dotted decimal format (A.B.C.D). If
omitted, the mtrace starts from the system at which the command is typed.
group-address/
hostnamae
Enter the multicast group address in dotted decimal format (A.B.C.D). If group
address is not given then software shall invokes a weak mtrace. A weak mtrace
is one that follows the RPF path to the source, regardless of whether any router
along the path has multicast routing table state
Multicast 789