This attribute specifies the guaranteed number of switched multicast
branches that can be activated on this AtmIf, including those
activated beneath a Vpt.
The sum of minMulticastBranches and the number of provisioned
branches listed in the nextHop attribute of all Mnrps across all
spared AtmIfs linked to that Lp must not exceed the
protectedMcstBranchesCapacity attribute of the Arc component.
The sum of minMulticastBranches and the number of provisioned
branches listed in the nextHop attribute of all Mnrps across all
unspared AtmIfs linked to that Lp must not exceed
multicastBranchesCapacity attribute of the Arc component.
For CQC-based ATM cards, the value of the attribute can not
exceed 10752.
If this value is non zero, the Arc component must exist and have
multicastBranchesCapacity set to a value greater than or equal to
this attribute.