Cisco Cisco IOS Software Release 12.2(33)SRE

© 2007 Cisco Systems, Inc. All rights reserved.

The IP Multicast Load Splitting—Equal Cost Multipath (ECMP) Using S, G and Next Hop feature 
introduces more flexible support for ECMP multicast load splitting by adding support for load splitting 
based on source and group address and on source, group, and next-hop address. This feature enables 
multicast traffic from devices that send many streams to groups or that broadcast many channels, such 
as IPTV servers or MPEG video servers, to be more effectively load split across equal-cost paths. Prior 
to the introduction of this feature, the Cisco IOS software only supported ECMP multicast load splitting 
based on source address, which restricted multicast traffic sent by a single source to multiple groups 
from being load split across equal-cost paths.

Configuration information is included in the “Load Splitting IP Multicast Traffic over ECMP” module 
of the Cisco IOS IP Multicast Configuration Guide, Release 12.4T,

at the following URL:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124tcg/timcst_c/mctlsplt.htm

The following sections provide information about this feature:

ECMP Multicast Load Splitting Based on Source and Group Address Using the Basic S-G-Hash 
Algorithm

ECMP Multicast Load Splitting Based on Source, Group, and Next-Hop Address Using the 
Next-Hop-Based Hash Algorithm

For a complete list of features included in the “Load Splitting IP Multicast Traffic over ECMP” module, 
see the Feature Information Table located toward the end of the module.

Command reference information is included in the Cisco IOS IP Multicast Command Reference, 
Release 12SR, at the following URL: