I-D ACTION:draft-armitage-ion-cluster-size-01.txt

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       Title     : Issues affecting MARS Cluster Size                      
       Author(s) : G. Armitage
       Filename  : draft-armitage-ion-cluster-size-01.txt
       Pages     : 12
       Date      : 09/09/1996

IP multicast over ATM currently uses the MARS model [1] to manage the use 
of ATM pt-mpt SVCs for IP multicast packet forwarding. The scope of any 
given MARS services is the MARS Cluster - typically the same as an IPv4 
Logical IP Subnet (LIS). Current IP/ATM networks are usually architected 
with unicast routing and forwarding issues dictating the sizes of 
individual LISes. However, as IP multicast is deployed as a service, the 
size of a LIS will only be as big as a MARS Cluster can be. This document 
provides a qualitative look at the issues constraining a MARS Cluster's 
size, including the impact of VC limits in switches and NICs, geographical 
distribution of cluster members, and the use of VC Mesh or MCS modes to 
support multicast groups.                                                  

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