User Manual UMN:CLIV5812G365To specify a TTL threshold for multicast packets, use the following command.Command Mode Descriptionip multicast ttl-threshold<0-255> InterfaceSpecifies a TTL threshold for multicast packets.0-255: TTL value (default: 1)no ip multicast ttl-threshold Deletes a specified TTL threshold for multicast packets.9.3.1.3 ECMP Load SplittingMulticast routing protocols have different forwarding policies for the equal cost multipath(ECMP). In case of PIM, the interface with highest IP address is used to forward multicasttraffic over the equal cost multipath.The purpose of this feature is load splitting for forwarding multicast traffic over ECMP,allowing more efficient use of network resources and preventing traffic congestion. Withthis feature, multicast traffic is split across the equal cost multipath based on either itssource address or its source and group address.Fig. 9.5 Multicast Equal Cost Multipath (ECMP)ECMP load splitting has two options for next hop decision:• srcip selects next hop based on source address.• srcgrpip selects next hop based on both source and group address.To enable ECMP load splitting, use the following command.Command Mode Descriptionip multicast multipath [srcip |srcgrpip] GlobalEnables ECMP load splitting.srcip: source address (default)srcgrpip: source and group addressno ip multicast multipath Disables ECMP load splitting.9.3.1.4 MRIB Entry LimitYou can limit the maximum number of multicast routing entries in the multicast routingtable in the multicast routing information base (MRIB), and then the system generates anerror message when the number of the entries exceeds the limit. If the warning thresholdis specified, the system generates a warning message when the number of the entriesexceeds the threshold.
