IB_MC_SCOPE_SUBNET_LOCAL
mcg_attr.mc_scope = IB_MC_SCOPE_SUBNET_LOCAL;
mcg_attr.mc_scope = IB_MC_SCOPE_SUBNET_LOCAL;
uchar_t scopes[] = { IB_MC_SCOPE_SUBNET_LOCAL,
mcg_attr.mc_scope = IB_MC_SCOPE_SUBNET_LOCAL;
((uint64_t)IB_MC_SCOPE_SUBNET_LOCAL << 48) |